prevalence

nouns

the quality of prevailing generally; being widespread
"he was surprised by the prevalence of optimism about the future"
is derived from
is derived from
is a type of (narrower)
the quality of being general or widespread or having general applicability
(epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population
domain category
the branch of medical science dealing with the transmission and control of disease
is a type of (narrower)
the relative magnitudes of two quantities (usually expressed as a quotient)
a superiority in numbers or amount
"a preponderance of evidence against the defendant"
is derived from