Chinese phrase
大概多久？ dà gài duō jiǔ
Meaning
Roughly how long?
When to use it
Asks for an approximate length of time. It is a brief, neutral question used when an exact duration is not needed.
Example dialogue
这班车 大概多久？ zhè bān chē dà gài duō jiǔ
Roughly how long does this bus take?
大约要四十分钟。 dà yuē yào sì shí fēn zhōng
It takes about forty minutes.