# How do you say "once every x days/weeks/etc"?

Could anyone help me with this translation? I think once per week is "shuu ichi" but with days in particular I really don't remember how to say it.

• Are you looking for おき and ごと. Check those words and how they are used. Jul 30, 2016 at 5:57
• ^ But "once a week" "twice a week" "once a day" "twice a day" etc. cannot be expressed with おき or ごと, right? Jul 30, 2016 at 7:00
• @chocolate the OP is not asking for twice a day. Check the title: "once every x days/weeks/etc" Aug 1, 2016 at 2:05

The most generic and useful pattern is `number + counter + に + number + 回/度`.

• 2年に1回 once in two years
• 6週間に1回 once in six weeks
• [1月]{ひとつき}に3回 ／ [1か月]{いっかげつ}に3回 three times a month
• 1年に2回 twice a year
• [1日]{いちにち}に3回 three times a day
• [2日]{ふつか}に3回 three times in two days

There are some irregular readings when referring to a time span. See the last part of this page.

You can also say 日【ひ】にn回, 週(に)n回, 月【つき】(に)n回, 年(に)n回 (but not 時間n回, 日n回, 週間n回, etc).

• 1週間に5回バイトをする = 週(に)5回バイトをする to work part-time five days a week
• 年(に)1度の総会 the annual general meeting

• 週七【しゅうなな】でバイトをする to work part-time seven days a week
• 月一【つきいち】のミーティング monthly meeting

In addition, there are 隔日【かくじつ】, 隔週【かくしゅう】, 隔月【かくげつ】, 隔年【かくねん】 which mean "every other ～".

• does the use of かくしゅう ever pose an ambiguity problem for native speakers (隔週、各週) Jul 30, 2016 at 9:28
• 隔週 is [かくしゅう]{LHHHH} while 各週 is [かくしゅう]{HLLLL}, and 各週 is very rarely used IMO (we use 毎週). Jul 30, 2016 at 9:34
• Thanks, that's very helpful. I'll take it as a species of grammatical overgeneralization I've committed as a foreigner then (not to be outdone by the span nearly a decade ago where I way saying [今年]{コンネン}) Jul 30, 2016 at 9:47
• @naruto You made your response so awesome that you forgot to answer the question. How would you say "once every x days/weeks/etc" ? Aug 1, 2016 at 2:07
• @oldergod I think the first part answer the question. x年に1回 / x週に1回 will do. Aug 1, 2016 at 2:30