1
general::
Phrase(s): time after time [and] time and (time) again
repeatedly; over and over (again). • You’ve made the same error time after time! Please try to be more careful! • I’ve told you time and again not to do that. • You keep saying the same thing over and over, time and time again. Stop it!
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, time and again;time and time again. Repeatedly, again and again, as in Time after time he was warned about the river rising, or We've been told time and time again that property taxes will go up next year. The first idiom dates from the first half of the 1600s, the variants from the first half of the 1800s.
American Heritage Idioms