I think you may be asking about frames per second (kind of like a paparazzi camera??) If that's the case- I shoot with a Nikon D300. It can shoot 6-8 frames per second allowing awesome opportunities for sports, nature- anywhere there is action and movement. It is also useful if you are doing model shots as it captures small changes in pose and expression- it can make all the difference.
I love my camera- It was pricey, but if you are a serious photographer it is well worth the investment.
you can get an idea of the quality if you want to check out my photo site:
I hope this helps