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〜おきに

at intervals of; every other

Number + counter + おきに

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おきに describes regular intervals: このバスは十分おきに来る, "this bus comes every ten minutes".

With time and distance, おきに and ごとに mean the same: 六時間おきに and 六時間ごとに both mean "every six hours".

With countable things, though, おきに skips one: 一日おきに is "every other day", 一行おきに is "every other line". It's literally "leaving one in between". ごとに with the same number means "every single one": 一日ごとに, "every day".

That difference is easy to get wrong, so check which one you mean when the number is one.

Examples

  • このバスは十分じゅっぷんおきに来くる。

    This bus comes every ten minutes.

  • 一日いちにちおきにジムに行いっている。

    I go to the gym every other day.

  • 薬くすりは六時間ろくじかんおきに飲のんでください。

    Please take the medicine every six hours.

  • 道みちには五ごメートルおきに木きが植うえてある。

    Trees have been planted every five metres along the road.

  • 一行いちぎょうおきに書かいてください。

    Please write on every other line.

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