incidence
Definitions
The occurrence, rate, or frequency of a disease, crime, or other undesirable event.
The angle at which a line or ray of light meets a surface.
The act or manner of falling upon or affecting something.
Examples
The high incidence of respiratory infections in the city has prompted officials to issue a health warning.
Researchers are studying the incidence of rare diseases in rural populations to identify potential environmental triggers.
Synonyms
occurrence frequency rate prevalence event instance happening