‘-는 동안, – 동안’ is used to indicate a duration of time in which an action or an event occurs.
● 한국에서 사는 동안 친구를 많이 사귀었어요. (I made many friends while I was living in Korea.)
● 기다리시는 동안 이 잡지를 읽으시겠어요? (Would you like to read this magazine while you wait?)
● 방학 동안에 뭘 할 거예요? (What would you do during summer vacation?)