Simple [quadr]duple drum pattern, against which duration is measured in much popular music: About this sound Play .
Compound triple drum pattern: divides three beats into three. About this sound Play  Contains repetition on three levels.
Rhythm, a sequence in time repeated, featured in dance: an early moving picture demonstrates the waltz.

Rhythm (from Greek ῥυθμός, rhythmos, "any regular recurring motion, symmetry" ) generally means a "movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions" . This general meaning of regular recurrence or pattern in time can apply to a wide variety of cyclical natural phenomena having a periodicity or frequency of anything from microseconds to millions of years.

In the performance arts rhythm is the timing of events on a human scale; of musical sounds and silences, of the steps of a dance, or the meter of spoken language and poetry. Rhythm may also refer to visual presentation, as "timed movement through space" ({{#invoke:Footnotes|harvard_citation_no_bracket}}, {{ safesubst:#invoke:Unsubst||$N=Page needed |date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[page needed] }}) and a common language of pattern unites rhythm with geometry. In recent years, rhythm and meter have become an important area of research among music scholars. Recent work in these areas includes books by Maury Yeston , Fred Lerdahl and Ray Jackendoff, Jonathan Kramer, Christopher Hasty , Godfried Toussaint , William Rothstein, and Joel Lester .

In Thinking and Destiny, Harold W. Percival defined rhythm as the character and meaning of thought expressed through the measure or movement in sound or form, or by written signs or words {{#invoke:Footnotes|harvard_citation_no_bracket}}.

Rhythmically sections