Source : Free On-Line Dictionary of Computing

frame rate
     
         The number of {frames} of an {animation} which are
        displayed every second, measured in frames per second (fps).
        The higher the frame rate, the smoother the animation will
        appear but the more processing power and system {bandwidth} is
        required.
     
        At less than 30 fps, the human eye can see the new pictures
        coming onto the screen.
     
        (2000-02-02)