Chinese phrase
多久一班？ duō jiǔ yì bān
Meaning
How often do they run?
When to use it
Asks how often buses, trains, or other services run. It is a concise, neutral question about the usual time between departures.
Example dialogue
请问到市中心的公交多久一班？ qǐng wèn dào shì zhōng xīn de gōng jiāo duō jiǔ yì bān
Excuse me, how often do buses to downtown run?
平常大概每十分钟一班，高峰期会更频繁。 píng cháng dà gài měi shí fēn zhōng yì bān gāo fēng qī huì gèng pín fán
They usually come about every ten minutes, and more often during rush hour.