用 英文HOW OFTEN問幾耐有班火車開出?

幾耐有班火車開出 =
How often does a train leave here?

幾耐有班火車開出去 xxxxx地方
What is the frequency of the train to xxxxx (place)?

or

May I have the time table of the train to xxxxx ( place)?

可以給我火車(地方) 的時間表?

幾耐有班火車開出 =
How often does a train leave here?

but maybe is wrong