What is "frame rate"

n. the measurement of how quickly an imaging device can produce unique consecutive images called frames, most often expressed in frames per second (often abbreviated "fps") or, equivalently, Hertz (Hz).

Frame rate, also known as frame frequency, is the frequency (rate) at which an imaging device displays consecutive images called frames. The term applies equally to film and video cameras, computer graphics, and motion capture systems. Frame rate is usually expressed in frames per second (FPS).