に (Frequency) - Grammar Discussion

(times) in each (time period)
every

Structure

  • Timeframe + + Number of Times

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Shouldn’t 当たり be accepted in at least some of the sentences?

Just wanted to point out that the Tanos link is broken.

For the timeframe, I’m a bit confused about the correct duration counters to use. Would all of these options be acceptable for 1 month / 1 year respectively:

Month: に / 一月に / 一ヶ月に / 一ヶ月間
Year: に / 一年に / 一年間に / 年間