noun
oscillation
ah-sih-LAY-shun/ˌɑːsɪˈleɪʃn/
A repeated movement or change back and forth.
The metronome arm's oscillation carries it evenly back and forth.

Etymology
The pieces express the action of swinging. Movement between physical positions supplied the image for figurative oscillation between opinions, attitudes, or other states.
In context
you will notice a tendency of rushing or delaying the beat so beware of that because developing control and avoiding this oscillation is precisely the goal of this exercise
More examples
- We measure the spring's oscillation with a sensor.
- The graph shows daily oscillations in the room's temperature.
- Her oscillation between hope and fear leaves her exhausted.
Forms
oscillation · oscillations
oscillate verb — To move or change repeatedly back and forth.
Similar words
- swinging
- Usually describes physical movement back and forth along an arc.
- fluctuation
- Describes changes in level or amount, often without regular rhythm.
- vibration
- Usually describes rapid physical oscillation over a small distance.