며칠 동안

for several days

→ 며칠
phrase Rare #21,802
for several days Used to describe how long something lasts.
KO: 며칠 동안 비가 계속 왔어요.
EN: It rained for several days.

며칠 동안 못 봤어

I haven’t seen you in a few days.

— 색, 계 (2007)