Korean phrase
~ 얼마나 돼요? ~ eol ma na twae yo
Meaning
How long has it been since ___?
When to use it
This asks how much time has passed since an event. It is a polite question, often answered with a number of days, months, or years.
Example dialogue
한국에 온 지 얼마나 돼요? han gu ge on chi eol ma na twae yo
How long has it been since you came to Korea?
두 달 됐어요. tu tal twae sseo yo
It's been two months.