Examples from the Web for periodicity
Periodicity has been noted in various disorders of nervous character.
The main factor in producing this very marked annual periodicity seems to me to be wholly unconnected with the sexual impulse.
Periodicity of another kind known as “cyclic,” and due to a different set of causes, is believed to exist by many persons Cycles.
Wherever we can trace the law of periodicity we are strongly impressed with the idea of rotatory or orbitual motion.
The reason most probably depends, as before intimated, on another phenomenon of periodicity corresponding to the month.Moon Lore|Timothy Harley