The Collaborative International Dictionary
Periodicities
Periodicity \Pe`ri*o*dic"i*ty\, n.; pl. Periodicities. [Cf. F.
p['e]riodicit['e].]
The quality or state of being periodical, or regularly
recurrent; as, the periodicity in the vital phenomena of
plants.
--Henfrey.
Wiktionary
periodicities
n. (plural of periodicity English)
Usage examples of "periodicities".
Fashions change for arbitrary reasons and although there are regularities—cycles, periodicities, and correlations—these are merely descriptive, not explanatory.
They wished a world which would be congenial to their physiological rhythms, developed in harmony with given environmental periodicities of darkness and light.