Question

i eat 4 times a day change into verb

Answer 1

Answer:

Tell me please the difference in meaning between the following sentenced?

I eat twice a day.

I eat twice in a day.

I am sure that in a day is a valid phrase, but I cannot figure out the difference between it and a day as in my sentences.

Answer 2

Answer:

I ate 4 times a day ^^❣︎❣︎