Pulsation (noun)

A rhythmic or steady beat, vibration or oscillation.

Origin:

Derived from the latin 'pulsare' meaning 'to beat'.

Examples:

1. The pulsation of the bass drum set the tempo for the entire band.
2. The pulsation of the engine indicated that it was running smoothly.
3. The pulsation of the heartbeat could be seen on the monitor.
4. The pulsation of the stars was used to determine their distance from Earth.
5. The pulsation of the waves on the shore created a soothing sound that helped her fall asleep.