Average person can easily click with speed from 5 to 7 CPS for 10-60 seconds. It is very common number and can be achieved with regular clicking technique. Anything higher than 7 CPS can be considered as good result.Why are my keyboard keys not working?
If all else fails, replace the keyboard. If all of the previous suggestions have been completed and one or more keys are still not working, it is likely that the keyboard is defective and needs to be replaced.