Ocean waves have distinct parts. The wave crest is the highest part of the wave. The wave trough is the valley between wave crests. Wave height is the vertical distance between a wave crest and the adjacent trough, while wave length is the horizontal distance between two successive crests. And the time it takes for two successive wave crests to pass a fixed point, measured in seconds is the wave period. Frequency is the number of waves passing a fixed point per second...

Below: One hand to the boat, my other hand was holding the camera, to get the awesome unusual great picture of something worth taking home and being framed, hung up or stood against a wall...

(Link to Seafloor maps)