record/register, in a while/for a while

english-test.net/toeic/liste … loyed.html

1.to record all my expenses=to register all my expenses?
2. I haven’t seen you in awhile. = in a while? = in a moment? - but It doesn’t suit me in this sentence: in a while,
shouldn’t it be:
I haven’t seen you for a while?

thanks

  1. to write down in detail on the appropriate forms, etc. all my expenses.
  2. ‘In a while’ = ‘for a while’ here. Another example of choice in English. for a while - for some time.