I think it depends. I have an extremely lazy baby lol. I can go a whole day without feeling anything. I freaked out the first time that happen and went to get checked out everything was fine. My doc said some babies are just lazy.
I have been told i should feel ten an hour. It depends on the day though. My son will move all over the place one day, and the next i wont feel him until i lay down. If you are concerned go to L&D. Its better to get checked, then to sit at home and stress yourself out.