how long与how much time的意思可否相同？

how much time=多少时间
例：how much time you have spend to do this work?（24 hours)

how long = 几天
例：how long is your vacation? ( 2days)

如果，how much time is your vacation,那好像是要问对方用了多少时间，有点怪怪的。

都是多长时间

how long 时间段要长
how much time 时间段比较短

在表示时间长短时可以相同。
how long 时间段要长
how much time 时间段比较短

我个人认为相同.