German phrase
Wie lange wohnen Sie schon ~?
Meaning
How long have you been living in ___
When to use it
It asks how long you've lived. It is a polite question about your ongoing residence in a place.
Example dialogue
Wie lange wohnen Sie schon in Berlin?
How long have you been living in Berlin?
Ich wohne seit einem Jahr in Berlin.
I've been living in Berlin for a year.