Student or Learner
I would like to know the difference between "1" and "2".
Where have you been?
1:I've waited for ages. / 2:I've been waiting for ages.
If there is no difference, which is more used?
"I've waited for ages for the book to arrive."
I would say that the PP continuous is the more common one for this situation. It shows a continuing sense of waiting and it sounds a little more insistent.