目錄
In Korean, “쯤, 즈음, 무렵” are often all translated as “about,” “around,” or “when,” so they can look almost interchangeable at first. Their differences become clearer once you see them in actual sentences. “두 시쯤” simply gives an approximate time around two o’clock, “회의가 끝날 즈음” follows the event of the meeting approaching its end, while “졸업할 무렵” refers more broadly to the period around graduation. All three deal with imprecise time, but what the sentence is trying to express is different.
What Do Korean “쯤, 즈음, 무렵” Mean? Approximate Amounts, Events Nearby in Time, and Time Backgrounds
“쯤” is best suited to information that can be estimated. It can follow clock times, dates, durations, numbers of people, prices, and ages, as in “두 시쯤,” “한 시간쯤,” and “오십 명쯤.” It is not specifically a time expression. Instead, it adds the meaning “approximately this much” or “roughly around this point” to the number or range before it.
“즈음” is a dependent noun indicating the point when something has developed to roughly a certain stage. It very often appears after “-(으)ㄹ,” so structures such as “회의가 끝날 즈음” and “도착할 즈음” show its actual function more clearly than simply thinking of it as a formal version of “쯤.” It can also follow time nouns, as in expressions such as “저녁 즈음.”
“무렵” is also a dependent noun and refers to a time roughly overlapping with a certain period. Expressions such as “저녁 무렵,” “졸업할 무렵,” and “겨울이 올 무렵” do not focus on an exact hour or minute. Instead, they place an event within an approximate time background.
- Example: 여섯 시쯤 역 앞에서 만나요.
Romanization: yeo-seot si-jjeum yeok ap-e-seo man-na-yo.
Translation: Let’s meet in front of the station around six.
“쯤” treats six o’clock as an approximate center point, so the actual meeting time may be slightly earlier or later. It is very natural for making casual arrangements. - Example: 회의가 끝날 즈음에 다시 연락드리겠습니다.
Romanization: hoe-ui-ga kkeut-nal jeu-eum-e da-si yeon-rak-deu-ri-ge-sseum-ni-da.
Translation: I’ll contact you again around the time the meeting is ending.
“끝날 즈음” places the contact time near the point when the meeting is approaching its end. The focus is on the event reaching a certain stage. - Example: 해 질 무렵에 공원이 가장 조용해져요.
Romanization: hae jil mu-ryeop-e gong-won-i ga-jang jo-yong-hae-jyeo-yo.
Translation: The park becomes quietest around sunset.
“해 질 무렵” treats the period around sunset as a broader time background rather than requiring an exact clock time.
Korean “쯤, 즈음, 무렵” Conjugation and Attachment Rules
Although “쯤, 즈음, 무렵” can all appear with time expressions, they belong to different grammatical categories. “쯤” is a suffix, so it attaches directly to the noun or noun phrase before it. “즈음” and “무렵” are dependent nouns, so they are generally written separately from the preceding element.
| Expression | Word Class and Main Structure | Writing | Common Meaning |
|---|---|---|---|
| “쯤” | Noun/noun phrase+쯤 | 두 시쯤 | Approximately this time or amount |
| “즈음” | Time noun+즈음/-(으)ㄹ 즈음 | 저녁 즈음、끝날 즈음 | Around the time an event occurs |
| “무렵” | Time noun+무렵/-(으)ㄹ 무렵 | 저녁 무렵、졸업할 무렵 | Roughly overlapping with a certain period |
| “-(으)ㄹ 즈음” | Verb stem+-(으)ㄹ+즈음 | 도착할 즈음 | When an event is approaching a certain stage |
| “-(으)ㄹ 무렵” | Verb stem+-(으)ㄹ+무렵 | 도착할 무렵 | Around the period when an event is about to occur |
“쯤” Attachment Rules|Directly Follows Times, Quantities, Ages, and Prices
The range of “쯤” extends beyond time. Whenever the preceding element is a number or quantity that can be estimated, “쯤” appears naturally. This is also the clearest difference between “쯤” and the other two expressions: “즈음” and “무렵” are mainly related to time, while “쯤” can directly estimate numbers of people, prices, and distances as well.
- Example: 한 시간쯤 기다렸어요.
Romanization: han si-gan-jjeum gi-da-ryeo-sseo-yo.
Translation: I waited for about an hour.
One hour is an estimated duration, and there is no need to specify the exact number of minutes, so “쯤” is used directly. - Example: 참가자가 오십 명쯤 왔어요.
Romanization: cham-ga-ja-ga o-sip myeong-jjeum wa-sseo-yo.
Translation: About fifty participants came.
“쯤” estimates the number of people, and this use cannot be replaced with “무렵.” - Example: 서른 살쯤부터 운동을 시작했어요.
Romanization: seo-reun sal-jjeum-bu-teo un-dong-eul si-jak-hae-sseo-yo.
Translation: I started exercising at around age thirty.
When the speaker remembers only the approximate age, “서른 살쯤” naturally leaves some flexibility.
“-(으)ㄹ 즈음” Attachment Rules|Around the Time an Event Is About to Happen
“즈음” indicates that something has developed to roughly a certain point and is especially common after “-(으)ㄹ.” So rather than memorizing only “두 시 즈음,” it is more useful to first become familiar with structures such as “끝날 즈음,” “도착할 즈음,” and “시작될 즈음.”
Combinations with time nouns such as “저녁 즈음” are also possible, but this does not mean that every noun+쯤 construction can automatically be replaced with noun+즈음.
- Example: 회의가 끝날 즈음에 자료를 보내 주세요.
Romanization: hoe-ui-ga kkeut-nal jeu-eum-e ja-ryo-reul bo-nae ju-se-yo.
Translation: Please send the materials around the time the meeting is ending.
The time for sending the materials is close to the stage when the meeting is ending, so “끝날 즈음” is natural. - Example: 집에 도착할 즈음 비가 내리기 시작했어요.
Romanization: ji-be do-chak-hal jeu-eum bi-ga nae-ri-gi si-jak-hae-sseo-yo.
Translation: It started raining when I was almost home.
“도착할 즈음” indicates that the event had already approached the point of arriving home. - Example: 봄이 시작될 즈음에는 날씨 변화가 커요.
Romanization: bom-i si-jak-doel jeu-eum-e-neun nal-ssi byeon-hwa-ga keo-yo.
Translation: Around the time spring begins, the weather changes a lot.
Seasons do not change at one precise instant, so “시작될 즈음” expresses the period approaching that seasonal transition.
“-(으)ㄹ 무렵” Attachment Rules|Common with Seasons, Historical Periods, and Life Stages
“무렵” refers to a time that roughly corresponds with a particular period. It works naturally with temporal backgrounds such as “저녁, 봄, 그때,” and it also frequently follows “-(으)ㄹ” to describe the period around when an event is about to happen.
“즈음” and “무렵” overlap considerably, so it is not useful to simplify the difference into “즈음 is always a point and 무렵 is always a long period.” A more common tendency is that “무렵” works especially well for narrative backgrounds, stages of life, seasons, and historical periods, while “즈음” often follows an event that is approaching.
- Example: 대학교를 졸업할 무렵 진로를 다시 고민했어요.
Romanization: dae-hak-gyo-reul jo-reop-hal mu-ryeop jin-ro-reul da-si go-min-hae-sseo-yo.
Translation: Around the time I was graduating from university, I reconsidered my career path.
“졸업할 무렵” includes the broader period around graduation and preparing to enter the next stage of life, not just the graduation ceremony itself. - Example: 겨울이 올 무렵에는 해가 일찍 져요.
Romanization: gyeo-ul-i ol mu-ryeop-e-neun hae-ga il-jjik jyeo-yo.
Translation: Around the time winter approaches, the sun sets earlier.
The arrival of winter is gradual, so “무렵” works naturally for describing that seasonal transition. - Example: 그 무렵에는 이 동네에 카페가 많지 않았어요.
Romanization: geu mu-ryeop-e-neun i dong-ne-e ka-pe-ga man-ji a-na-sseo-yo.
Translation: Around that time, there were not many cafés in this neighborhood.
“그 무렵” refers back to a period already established in the preceding context and is especially common in recollections and narratives.
Three Common Uses of Korean “쯤, 즈음, 무렵”: Estimating an Amount, Approaching an Event, and Looking Back on a Period
All three expressions make time less precise, but they do not serve the same function. “쯤” first answers “approximately how much?” “즈음” often places one event near the time another event is about to occur, while “무렵” is especially useful for situating something within an approximate time background.
“쯤” Usage|Approximate Clock Times, Dates, Quantities, and Ages
The easiest way to identify “쯤” is to check whether the preceding content can be estimated numerically. It can follow times, numbers of people, amounts of money, distances, and ages, so its range extends further beyond time than “즈음” and “무렵.”
- Example: 열 시쯤 도착할 것 같아요.
Romanization: yeol si-jjeum do-chak-hal geot ga-ta-yo.
Translation: I think I’ll arrive around ten.
Since the arrival time can vary depending on traffic, ten o’clock is given as an approximate estimate. - Example: 이 책은 만 원쯤 해요.
Romanization: i chae-geun man won-jjeum hae-yo.
Translation: This book costs around ten thousand won.
Here, the estimated quantity is price, which is a typical non-time use of “쯤.” - Example: 여기서 역까지 십 분쯤 걸려요.
Romanization: yeo-gi-seo yeok-kka-ji sip bun-jjeum geol-lyeo-yo.
Translation: It takes about ten minutes from here to the station.
“십 분쯤” expresses an approximate duration, not a clock time.
“즈음” Usage|Around the Time Something Is About to Happen, End, or Enter the Next Stage
“즈음” works especially well with events that are progressing toward a certain stage. A meeting about to end, a train about to arrive, or a project approaching completion all contain a specific event that is drawing closer.
- Example: 행사가 끝날 즈음에 다시 안내 방송이 나옵니다.
Romanization: haeng-sa-ga kkeut-nal jeu-eum-e da-si an-nae bang-song-i na-om-ni-da.
Translation: Another announcement will be made around the time the event is ending.
The announcement is scheduled near the final stage of the event, which matches the event-centered use of “즈음.” - Example: 기차가 도착할 즈음에 역으로 나갈게요.
Romanization: gi-cha-ga do-chak-hal jeu-eum-e yeo-geu-ro na-gal-ge-yo.
Translation: I’ll head to the station around the time the train is arriving.
The action is timed relative to the train’s arrival rather than to an exact hour and minute. - Example: 프로젝트가 마무리될 즈음 문제가 하나 더 생겼어요.
Romanization: peu-ro-jek-teu-ga ma-mu-ri-doel jeu-eum mun-je-ga ha-na deo saeng-gyeo-sseo-yo.
Translation: Another problem came up when the project was nearing completion.
“마무리될 즈음” marks the point when the project had already entered its final stage.
“무렵” Usage|A Period Around a Season, Historical Era, Life Stage, or Memory
“무렵” appears very often in narratives. Childhood, the period around graduation, seasonal transitions, a particular era, or evening are all difficult to reduce to a single point in time, and “무렵” preserves those fuzzy boundaries.
- Example: 어릴 무렵에는 이 근처에서 자주 놀았어요.
Romanization: eo-ril mu-ryeop-e-neun i geun-cheo-e-seo ja-ju no-ra-sseo-yo.
Translation: When I was young, I often played around here.
Childhood is a period of life, so there is no need to specify one exact year or day. - Example: 벚꽃이 필 무렵 다시 오고 싶어요.
Romanization: beot-kkot-i pil mu-ryeop da-si o-go si-peo-yo.
Translation: I’d like to come back around the time the cherry blossoms bloom.
Blooming is a gradual seasonal process, so “무렵” works well for this kind of time background. - Example: 2000년 무렵 이 지역의 모습은 지금과 많이 달랐어요.
Romanization: i-cheon-nyeon mu-ryeop i ji-yeok-ui mo-seu-beun ji-geum-gwa man-i dal-la-sseo-yo.
Translation: Around the year 2000, this area looked very different from how it does now.
“2000년 무렵” refers to the period around the year 2000 rather than fixing the change to one particular day.
What Is the Difference Between Korean “쯤, 즈음, 무렵”? Comparing Time Range, Structure, and Usage
The most reliable way to distinguish the three is not by formality but by what can come before them and whether the sentence is estimating an amount or establishing a time background. “쯤” can directly handle quantities, while “즈음” and “무렵” mainly remain within the domain of time and overlap considerably with each other.
| Comparison | “쯤” | “즈음” | “무렵” |
|---|---|---|---|
| Word class | Suffix | Dependent noun | Dependent noun |
| Typical structure | Noun/noun phrase+쯤 | -(으)ㄹ 즈음 | Time noun/-(으)ㄹ 무렵 |
| Main function | Approximate amount or range | Around the time an event is approaching | Roughly overlapping with a period |
| Non-time quantities | Yes | Usually no | No |
| Common situations | Appointment times, prices, numbers of people | Event progress, time transitions | Memories, seasons, historical periods, narrative background |
| Formal-only? | No | No | No |
▌“쯤” vs. “즈음”|First Ask Whether You Are Estimating a Number or Approaching an Event
“세 시쯤” and “세 시 즈음” can both mean around three o’clock, so they do overlap when used with a clock time. However, “쯤” can also extend naturally to “오십 명쯤” and “만 원쯤,” while “즈음” cannot simply replace it in those cases.
On the other hand, “회의가 끝날 즈음” is very natural because “즈음” can tie the time directly to the event of the meeting approaching its end. This distinction is more useful than memorizing which one supposedly sounds more formal.
✅ 세 시쯤 만나요.
Let’s meet around three.
✅ 회의가 끝날 즈음에 만나요.
Let’s meet around the time the meeting ends.
❌ 오십 명 즈음 왔어요.
If you simply mean “about fifty people,” use “오십 명쯤,” “오십 명 정도,” or “오십 명가량.”
▌“즈음” vs. “무렵”|They Overlap, So Don’t Force a “Point vs. Period” Distinction
Both “즈음” and “무렵” can refer to roughly the time when something happens, so in some sentences either can work. They do not represent completely opposite concepts of time.
A common tendency is that “즈음” closely follows the stage at which an event is about to occur, while “무렵” is particularly natural for establishing narrative background.
✅ 기차가 도착할 즈음에 역으로 나갔어요.
I went to the station around the time the train was arriving.
✅ 기차가 도착할 무렵 역 앞에는 사람들이 많았어요.
Around the time the train was arriving, there were already many people in front of the station.
The first sentence schedules an action near the point of “arrival,” while the second places the crowd within the broader background around the train’s arrival. This is a common nuance, not a strict rule that must apply to every sentence.
▌“쯤” vs. “정도”|Both Can Estimate Quantities, but Their Structures Differ
“정도” can also express an approximate degree or quantity, so “한 시간쯤” and “한 시간 정도” are often very similar in meaning. The clearest visible difference is that “쯤” attaches directly to what comes before it, while “정도” is written separately.
- Example: 한 시간쯤 걸려요.
Romanization: han si-gan-jjeum geol-lyeo-yo.
Translation: It takes about an hour.
“쯤” attaches directly to “한 시간” and is very common in casual estimates. - Example: 한 시간 정도 걸려요.
Romanization: han si-gan jeong-do geol-lyeo-yo.
Translation: It takes about an hour.
The basic meaning is similar, and “정도” also neutrally expresses an approximate amount or degree. - Example: 열 명쯤 더 올 것 같아요.
Romanization: yeol myeong-jjeum deo ol geot ga-ta-yo.
Translation: I think about ten more people will come.
“쯤” is natural for estimating numbers of people and can also be replaced with “열 명 정도.”
▌“무렵” vs. “때”|Not Every “When” Requires “무렵”
“때” is a very broad expression meaning “when” or “at the time,” and it can refer to when an event happens or to everyday habits. “무렵,” by contrast, carries the meaning of roughly overlapping with a certain period, so not every English “when” can be replaced with “무렵.”
✅ 집에 도착했을 때 전화했어요.
I called when I arrived home.
✅ 집에 도착할 무렵 비가 그쳤어요.
The rain stopped around the time I was almost home.
The first sentence directly connects the phone call with the point when the speaker had arrived home. The second indicates that the rain stopped roughly during the period when the speaker was approaching home.
Common Mistakes with Korean “쯤, 즈음, 무렵”: Spacing, Attachment, and Non-Interchangeable Uses
▌How Do You Space “쯤”? Write It Together as “두 시쯤”
“쯤” is a suffix, so expressions such as “두 시쯤,” “다음 주쯤,” “한 시간쯤,” and “오십 명쯤” are written together.
❌ 두 시 쯤 만나요.
✅ 두 시쯤 만나요.
❌ 한 시간 쯤 걸려요.
✅ 한 시간쯤 걸려요.
▌How Do You Space “즈음” and “무렵”? As Dependent Nouns, They Are Generally Written Separately
In “끝날 즈음” and “도착할 무렵,” both “즈음” and “무렵” are dependent nouns, so they are written separately from the preceding attributive form.
❌ 회의가 끝날즈음
✅ 회의가 끝날 즈음
❌ 졸업할무렵
✅ 졸업할 무렵
“저녁 즈음” and “저녁 무렵” are also written with a space.
▌How Can’t “무렵” Be Used? It Does Not Directly Estimate People, Prices, or Durations
“무렵” refers to the period around a certain time, not to a quantity. Prices, numbers of people, distances, or durations such as “about one hour” should use expressions such as “쯤,” “정도,” or “가량.”
❌ 사람이 오십 명 무렵 왔어요.
✅ 사람이 오십 명쯤 왔어요.
❌ 만 원 무렵이에요.
✅ 만 원쯤 해요.
▌Is “즈음” Always More Formal? You Cannot Replace Every “쯤” with “즈음”
“즈음” has its own grammatical position, with “-(으)ㄹ 즈음” being one of its most typical structures. If a sentence is simply estimating a price, number of people, or distance, you cannot make it formal merely by replacing “쯤” with “즈음.”
In a formal context, you could say:
참석자는 약 오십 명 정도입니다.
There are approximately fifty participants.
What needs to change is the overall register of the sentence, not mechanically replacing “쯤” with “즈음.”
Korean “쯤, 즈음, 무렵” in Conversation: Making Appointments, Work Situations, and Memories
“쯤” is the form you will encounter most often when casually arranging a time. “즈음” is useful when something reaches a certain stage, while “무렵” frequently appears when talking about life stages, seasons, or past backgrounds. These are still tendencies rather than rigid restrictions on where each word can appear.
▌Situation ①|Giving an Approximate Meeting Time with a Friend
A:내일 몇 시에 만날까요?
nae-il myeot si-e man-nal-kka-yo?
What time should we meet tomorrow?
B:두 시쯤 역 앞에서 만나요.
du si-jjeum yeok ap-e-seo man-na-yo.
Let’s meet in front of the station around two.
📌 Grammar Point: “두 시쯤” simply gives an approximate meeting time. If the meeting needs to be exactly at two, you can instead say “두 시 정각.”
▌Situation ②|Arranging Contact Around the End of a Meeting at Work
A:자료는 언제 보내 드리면 될까요?
ja-ryo-neun eon-je bo-nae deu-ri-myeon doel-kka-yo?
When should I send the materials?
B:회의가 끝날 즈음에 보내 주세요.
hoe-ui-ga kkeut-nal jeu-eum-e bo-nae ju-se-yo.
Please send them around the time the meeting is ending.
📌 Grammar Point: No exact clock time is specified. Instead, the point when the meeting is approaching its end serves as the reference for sending the materials, so “즈음” is natural.
▌Situation ③|Talking About a Period in the Past
A:한국어 공부는 언제 시작했어요?
han-gu-geo gong-bu-neun eon-je si-jak-hae-sseo-yo?
When did you start studying Korean?
B:대학을 졸업할 무렵에 시작했어요.
dae-ha-geul jo-reop-hal mu-ryeop-e si-jak-hae-sseo-yo.
I started around the time I was graduating from university.
📌 Grammar Point: “졸업할 무렵” does not recall the exact time of the graduation ceremony. Instead, it places the beginning of Korean study within the broader life stage around graduation.
Cultural Notes:
- “쯤” expresses approximation, but it does not mean an appointment can be treated casually. “두 시쯤” simply leaves some flexibility in the time itself. If both people need to arrive precisely, expressions such as “두 시까지” or “두 시 정각” may be confirmed separately.
- “즈음” can appear frequently in more complete written sentences, but its core function is not “formal language.” Therefore, the idea that “두 시쯤=spoken and 두 시 즈음=formal” can only be treated as a tendency in certain contexts, not as a fixed rule.
- “그 무렵” is especially useful in narratives. Once the previous context has established a year, stage of work, or life background, “그 무렵” can refer back to that period without repeating the full date.
How Do Korean “쯤, 즈음, 무렵” Compare with Japanese “〜ごろ/〜くらい/頃”?
The range of Korean “쯤” is broader than Japanese “〜ごろ.” When the preceding expression is a clock time or date, “두 시쯤” is very close to “2時ごろ.” When the preceding element is a duration, number of people, or price, Japanese normally uses “〜くらい/ぐらい” instead.
“무렵” overlaps considerably with Japanese “頃” when referring to a life stage, season, or period around an event, such as “卒業する頃” and “졸업할 무렵.” “즈음,” meanwhile, does not have one Japanese expression that works in every context, so forms such as “〜頃,” “〜する頃,” and “〜あたり” may be chosen depending on the sentence.
◆ Similar Expression ①: Japanese “〜ごろ”
Japanese “〜ごろ” mainly indicates the approximate vicinity of a point in time and is very close to the time-related use of Korean “쯤.”
- Example: 三時ごろ駅に着きます。
Kana: さんじごろえきにつきます。
Translation: I’ll arrive at the station around three.
This corresponds to Korean “세 시쯤 역에 도착해요,” with both using three o’clock as an approximate point in time. - Example: 十時ごろ寝ました。
Kana: じゅうじごろねました。
Translation: I went to bed around ten.
The sentence estimates what time the speaker went to bed, so “ごろ” is used. - Example: 二十歳ごろから一人暮らしをしています。
Kana: はたちごろからひとりぐらしをしています。
Translation: I’ve been living alone since around age twenty.
When age is treated as a position in time, this can be compared with Korean “스무 살쯤부터.”
◆ Similar Expression ②: Japanese “〜くらい/ぐらい”
“〜くらい/ぐらい” can estimate durations, quantities, and degrees, so when Korean “쯤” means “about one hour” or “about fifty people,” these Japanese forms are usually closer than “ごろ.”
- Example: 一時間ぐらい待ちました。
Kana: いちじかんぐらいまちました。
Translation: I waited for about an hour.
This corresponds to “한 시간쯤 기다렸어요.” The speaker is estimating a duration, not a clock time. - Example: 五十人ぐらい来ました。
Kana: ごじゅうにんぐらいきました。
Translation: About fifty people came.
This corresponds to Korean “오십 명쯤 왔어요.” - Example: 一万円ぐらいです。
Kana: いちまんえんぐらいです。
Translation: It is about ten thousand yen.
Korean can use “만 원쯤” to estimate a price, but Japanese cannot use “一万円ごろ.”
◆ Similar Expression ③: Japanese “〜頃”
When “頃” follows an event or a broader period, it can form a very natural comparison with Korean “무렵.” Both commonly place an event within an approximate time background.
- Example: 卒業する頃、将来についてよく考えました。
Kana: そつぎょうするころ、しょうらいについてよくかんがえました。
Translation: Around the time I was graduating, I thought a lot about my future.
Like “졸업할 무렵,” this does not require a precise match with the exact moment of graduation. - Example: 子どもの頃、この公園でよく遊びました。
Kana: こどものころ、このこうえんでよくあそびました。
Translation: When I was a child, I often played in this park.
Japanese “頃” treats childhood as a period, while Korean can use “어릴 때” or “어릴 무렵” depending on the nuance. - Example: 桜が咲く頃にまた来たいです。
Kana: さくらがさくころにまたきたいです。
Translation: I’d like to come back around the time the cherry blossoms bloom.
Korean can say “벚꽃이 필 무렵 다시 오고 싶어요,” with both expressions creating a seasonal time background.
◆ Core Differences from “쯤, 즈음, 무렵”:
Japanese “〜ごろ” mainly estimates points in time, while “〜くらい/ぐらい” can estimate quantities and durations, and “頃” can describe broader periods. Korean “쯤” covers part of the functions of both of the first two expressions, while “즈음” and “무렵” are mainly restricted to the time domain. So when translating, you cannot simply see the English word “about” and always choose the same Japanese form.
The real difference among “쯤, 즈음, 무렵” is not which one sounds more sophisticated. With “쯤,” first ask whether the preceding element is a time or quantity that can be estimated. “즈음” very often follows “-(으)ㄹ” and places the sentence near the point where an event is about to happen. “무렵” is particularly useful for establishing a time background that roughly overlaps with a certain period. “즈음” and “무렵” naturally overlap, so there is no need to force an absolute rule that one always means a single point while the other always means a longer period.
FAQ
“쯤” is a suffix that mainly follows nouns or noun phrases to express an approximate quantity or range. “즈음” is a dependent noun and very often follows “-(으)ㄹ” to indicate the point when something has roughly developed to a certain stage. “두 시쯤” and “두 시 즈음” may overlap, but “오십 명쯤” cannot simply be changed to “오십 명 즈음.”
There is no fixed rule saying that “무렵” always covers a longer period. “즈음” and “무렵” overlap considerably. In actual usage, “즈음” often stays close to the stage at which an event is about to happen, while “무렵” is especially natural with seasons, historical periods, and narrative backgrounds, but these are only general tendencies.
No. “쯤” is a suffix, so it is written together with the preceding expression: “두 시쯤,” “다음 주쯤,” “한 시간쯤,” and “오십 명쯤.” Do not write “두 시 쯤” or “한 시간 쯤.”
Yes. Both can refer to the period around two o’clock. “즈음” and “무렵” are dependent nouns, so they are written separately from the preceding time noun. If friends are simply arranging to meet around two, “두 시쯤” is usually more concise. If the context is establishing a time background, “두 시 즈음” or “두 시 무렵” can also be used.
No. “세 시쯤,” referring to a point around three o’clock, can correspond to “3時ごろ,” but “한 시간쯤” and “오십 명쯤” mean “about one hour” and “about fifty people,” so Japanese normally uses “一時間ぐらい” and “五十人ぐらい.” You first need to determine whether the preceding expression is a point in time or a quantity/duration.