The Four Four
Even within the starkest of backbeats; a quantized, two note repeating phrase of 90 degree angularity, every possible rhythmic pattern in the universe occurs inside that phrase, (though passing by unnoticed). Rhythmic patterns as such are certainly human constructs, and if that sounds too esoteric, then recall how we delineate time as it relates to the Earth's rotation. It is always 8:43pm somewhere on this planet, but it is also always 10:31am as well. Midnight, noon, 8:14:98, etc.. All time occurs at the present tense.
Concerning the workhorse of the 20th and 21st Century; the Backbeat, 4-4, Rock Beat, etc.