prevalence
/prˈɛvʌlʌns/
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Definitions
Noun
the quality of prevailing generally; being widespread; "he was surprised by the prevalence of optimism about the future"
Noun
(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
Noun
a superiority in numbers or amount; "a preponderance of evidence against the defendant"