英语中，名词的请假off和leave有什么区别？若请两周应该用什么？

have two weeks off
or; have two weeks' leave

leave
[li:v]
n.
（常与to + inf连用）准许；同意
休假
假期；不在期间
He had six weeks' leave.
他有六个星期的休假。

off
不工作，休息
With only one day off in a week working people had barely enough time to arrange the household.
一周休息一天时,上班族只能有时间勉强安排家务。
have Sunday off
星期日休息

leave是辞职的意思
Off只是请假

应该用off
i.e. :i want to take two weeks off from work.

ask for leave for two weeks