三 + the general counter 回 (times, occurrences).
Common collocations
- 一日に三回: three times a day
- 週に三回: three times a week
- 三回目: the third time
- 三回戦: the third round (of a tournament)
Similar words
- 三度: three times — interchangeable in most contexts, and the usual choice in set phrases such as 三度の食事 (three meals a day)
- 三回忌: the second-anniversary memorial service — a fixed Buddhist term, counted differently from ordinary repetitions