In current use, incidence usually means "rate of occurrence" and is often qualified in some way ("a high incidence of diabetes"). ... The plural incidences sometimes occurs in such contexts as "several recent incidences of crime," but this use is often criticized as incorrect.

Is it correct to say incidences?

Incidences, Incidents

Incidences is technically a real word, but it is often misused and is rarely called for. Those who say "incidences" usually mean "incidents." ... Sometimes the words can overlap. When incidents of crime are occurring with some regularity, there is an incidence of crime in the vicinity.

Is incidence a count noun?

NounEdit. (countable); (singular) The incidence of something is how often it happens. Regular blood pressure checks would reduce the incidence of heart disease and sudden heart attacks. There is a surprisingly high incidence of theft in book stores.