The is a measure of the number of waves that pass a point in a given amount of time fill in the blank

The frequency is a measure if the number of waves that pass a point in a given amount of time.

You could have answered this one from the previous questions you asked here ...

This phrase belongs in the blank:

  " frequency of the wave multiplied by the number
    of seconds in the given amount of time " .

If you had said "... pass a point in one second.", then the blank
would stand for simply " frequency ".