I have looked up examples for the use of incidence. While many give examples relating to rate/frequency, none gave me examples realtimg to occurance.
For example, i was told that using 'the last incidence of violence occured in february 'was wrong. Incident would have been a better use there.
incidence ˈɪnsɪd(ə)ns/Submit noun 1. the occurrence, rate, or frequency of a disease, crime, or other undesirable thing. "an increased incidence of cancer" synonyms: occurrence, prevalence, commonness; More