A vibration is a periodic change of state. This change of state, from one pole to the other, constitutes the frequency of the vibration. One pole becomes the other pole in Time sequence by varying each pole's constituent or aliquot parts.

Russell
"The Father - mother principle is fundamental in every expression and both are simultaneously manifested in every expression, each being preponderant sequentially during half of each cycle." Russell, The Secret of Light, page 125

"Every opposite of every pair is born, and becomes its opposite sequentially." [Atomic Suicide, page 234]

See Also

11.10 - Matter is the Recording of Sequential and Successive Steps of Polarized Thought
14.30 - Effect of Preponderance
14.31 - Preponderance Russell
7.4 - Preponderant Sequentially
7.5 - Successive Moments
alternate
chromatic succession
diatonic succession
Father
intermittent
Law of Compensation and Equilibrium
law of equal opposite and sequential interchange
law of etheric compensation and restoration
law of sequential preponderance
melodic succession
Mother
Polar and depolar intermittent accumulator
preponderance
Rotation and Revolution are Reciprocals
succession
Syntropy