Structure
Timeframe + に + Number of Times
Details
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Standard
About に (Frequency)
When the case marking particle に is used, sometimes it has the nuance of 'frequency'. This means that it can be utilized to describe how often something happens/is done. In this grammatical construction, the 'time frame' is followed by に, then followed by the number of times that you would like to say that something happens.
In this way, に keeps its regular nuance of being a 'goal', or 'destination', within which something else takes place.
Caution
This use of に should not be confused with で in relation to time. When で is used for 'time', it is expressing the amount of time that is required to do something, or how much time something is expected to take. It is not used for frequency.
- 2年間で50万円も貯めた。In two years, I saved up ¥500,000. (Natural Japanese, as this expresses the amount of time that something took)
Due to this, you can think of に as marking a portion (or portions) of time inside of a larger space of time, within which something happens. However, で marks a whole space of time, within which something can be/is completed.
Synonyms
Examples
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一年に三回ぐらい海外旅行に行く。
I take trips abroad about three times in a year. (frequency)
一日に六時間は寝る必要がある。
It is necessary to sleep for six hours every day. (frequency)
一時間に十本の電車がある。
There are ten trains every hour. (frequency)
公務員は一年に一回ボーナスをもらう。
Public servants get a bonus every year. (Once each year) (Frequency)
彼はタバコを1日に40本ぐらい吸う。
He smokes about 40 cigarettes every day. (40 each day)
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Genki II 1st Edition
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みんなの日本語 I
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に (Frequency) – Grammar Discussion
Most Recent Replies (2 in total)
narfi
Shouldn’t 当たり be accepted in at least some of the sentences?
atticusd
Just wanted to point out that the Tanos link is broken.
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