1. The relative frequency of occurrence of something
   "The study examined the relative incidence of various genetic mutations in the population";
   - relative incidence
    
2. The striking of a light beam on a surface
   "he measured the angle of incidence of the reflected light"

Sounds like: in, ence, incid

Derived forms: incidences

Type of: frequency, optical phenomenon, relative frequency

Encyclopedia: Incidence