Incidence vs Occurence - What's the difference?

As nouns the difference between incidence and occurence

is that incidence is the act of something happening; occurrence while occurence is .

(wikipedia incidence) (en noun)

The act of something happening; occurrence

The extent, or the relative frequency of something happening

(physics) The striking of radiation or a projectile upon a surface

(epidemiology) A measure of the risk that a person develops a new condition within a specified period of time, usually a year.

* angle of incidence * incidence algebra * incidence axiom * incidence function * incidence geometry * incidence graph * nonincidence