한번은

once

→ 한번
phrase Rare #14,269
once Used to introduce a particular past occasion in a story, often translated as “one time” or “on one occasion.”
KO: 한번은 친구와 길을 걷다가 우연히 선생님을 만났어요.
EN: One time, I ran into my teacher while walking with a friend.

한번은 테이블 위에 누워서 아빠가 그걸 보고 말했잖아

One time, I was lying on the table, and my dad saw me and said...

— 더 위치 (2016)