時間・時点N3
〜おきに
every other... / at intervals of...
Structure
数量 + おきに
Explanation
Indicates an interval, "every other... / at intervals of...". Attaches to a number + おきに (2日おきに = every other day).
Examples
この薬は8時間おきに飲んでください。
Take this medicine every 8 hours.
私は2日おきにプールで泳ぎます。
I swim every other day.
Note
おきに marks an interval; compare with ごとに (every): 2日ごとに means every two days, while 2日おきに means every other day.