英语短语辨析time and again many a time均有屡次,多次之意,那么有什么区别呢

time and again
无数次,屡次,一再
read the poem time and again.
我一遍又一遍地读这首诗.
=very ofte,over a long period:强调一段长时间里做某事许多次
The police were catching the same kids stealing time after time.
many a something formal or old-fashioned a large number of people or things:强调某事发生的多次
1】Many a parent has had to go through this same painful process.
2】I've sat here many a time (=often) and wondered what happened to her.
many a time
多次,常常
I have been here many a time.
我到这儿来过多次了.
=many times:
I've told you many a time not to ride your bike on the pavement.
如果你能给具体的题
我能更详细的解答