It occurs as detrital grains in sedimentary rocks. It forms under extreme pressure.
It can be transmit in hydraulic machine, exerting a small cross-sectional area can lead to pressure being transmitted
The frequency increasing makes the crests pass more quickly. Frequency is a count of how many times per second an event occurs. In waves, this event is the passing of an entire cycle. Once the cycle has passed, the wave repeats. The faster the wave repeats, the higher the frequency. For this reason, frequency has units of hertz, Hz. The unit of hertz is 1/s or "per second"