Korean phrase
~에 온 지 얼마나 됐어요? ~ e on chi eol ma na twae sseo yo
Meaning
How long has it been since you came to ___?
When to use it
This asks how long ago someone came to a place. It is a polite question about how long they have been there and can start a conversation.
Example dialogue
한국에 온 지 얼마나 됐어요? han gu ge on chi eol ma na twae sseo yo
How long has it been since you came to Korea?
벌써 두 달 됐어요. peol sseo tu tal twae sseo yo
It's already been two months.