No. 4,222 in Chinese
多久
"多久" means "how long."
In a sentence
你需要多久才能完成这个项目？
How long will you need to complete this project?
多久 is used to inquire about the duration someone will need to complete a task.
这场会议大概会开多久？
Approximately how long will this meeting last?
多久 is used to ask about the estimated duration of an event.
多久没看到你了，你最近好吗？
It's been so long since I've seen you; how have you been recently?
多久 is used here to express a long period without contact or seeing someone previously in a casual manner.
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