prevalence

noun

1. the quality of prevailing generally; being widespread

   noun.attribute

   Examples

   He was surprised by the prevalence of optimism about the future.

   Source: WordNet 3.0

2. (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.linkdef

   Source: WordNet 3.0

3. a superiority in numbers or amount

   noun.attribute

   Synonyms preponderance

   Source: WordNet 3.0

4. The quality or condition of being prevalent; superior strength, force, or influence; general existence, reception, or practice; wide extension; as, the <i>prevalence</i> of virtue, of a fashion, or of a disease; the <i>prevalence</i> of a rumor.

   noun

   Source: webster1913