Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun occurrence

2 senses of occurrence

Sense 1
happening, occurrence, occurrent, natural event -- (an event that happens)
       => event -- (something that happens at a given place and time)

Sense 2
occurrence -- (an instance of something occurring; "a disease of frequent occurrence"; "the occurrence (or presence) of life on other planets")
       => presence -- (the state of being present; current existence; "he tested for the presence of radon")