週(しゅう)

週(しゅう) means "week" and is used both as a noun and counter.

Counting patterns

• 週(しゅう) alone counts weeks in frequencies and ordinals: 週(しゅう)に3回(かい) (three times a week), 第(だい)2週(しゅう) (the second week)
• 何週(なんしゅう)目(め) (which week)
• 1週間(しゅうかん) (one week, as a duration)
• 2週間(しゅうかん) (two weeks)
• 数週間(すうしゅうかん) (several weeks)

Compounds

• 今週(こんしゅう) (this week)
• 来週(らいしゅう) (next week)
• 先週(せんしゅう) (last week)
• 再来週(さらいしゅう) (week after next)
• 毎週(まいしゅう) (every week)
• 週末(しゅうまつ) (weekend)
• 週間(しゅうかん) (week, week-long period)
• 週刊(しゅうかん) (weekly publication)

Watch out

• For a length of time use 週間(しゅうかん): 2週間(しゅうかん)休(やす)む (take two weeks off), not 2週(しゅう)休(やす)む.