What is the right option and why?

I haven't read a book In the last 6 months / Over the last 6 months.

Thanks in advance!

Question

What is the right option and why?

I haven't read a book In the last 6 months / Over the last 6 months.

Thanks in advance!

Answer

There are multiple correct and natural choices.

... in the last 6 months
... over the last 6 months
... during the last 6 months
... for the last six months

Answer

I would prefer to say something like that for this case:

I haven't read a book for 6 months, I need to catch up on reading.

Answer

Over the last 6 months is correct🌷

Answer

First phrase is good. Not the second