~おき
~おき · ~oki · JLPT N4 · noun
after every ~
📅 おき = 置き, from 置く (to put): put one aside, skip it, land on the next
おき comes from 置く, to place or leave. 一日おき literally means leaving one day in between, so every other day. Attach it to a number + counter: 二時間おき = at two-hour intervals, 三メートルおき = every three metres.