periodicity

[ peer-ee-uh-dis-i-tee ]

/ ˌpɪər i əˈdɪs ɪ ti /

the character of being periodic; the tendency to recur at regular intervals.

Origin of periodicity

From the French word périodicité, dating back to 1825–35. See periodic¹, -ity

Periodicity has been noted in various disorders of nervous character.

Studies in the Psychology of Sex, Volume 1 (of 6) |Havelock Ellis
The main factor in producing this very marked annual periodicity seems to me to be wholly unconnected with the sexual impulse.

Studies in the Psychology of Sex, Volume 1 (of 6) |Havelock Ellis
Periodicity of another kind known as “cyclic,” and due to a different set of causes, is believed to exist by many persons Cycles.

Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 6 |Various
Wherever we can trace the law of periodicity we are strongly impressed with the idea of rotatory or orbitual motion.

The World's Greatest Books - Volume 15 - Science |Various

The reason most probably depends, as before intimated, on another phenomenon of periodicity corresponding to the month.

Moon Lore |Timothy Harley

periodicity

[ pîr′ē-ə-dĭs′ĭ-tē ]

The quality or state of being periodic; recurrence at regular intervals.

The tendency of chemical elements to have similar properties when arranged according to their atomic number.

The position of an element in the periodic table.