Occurrence

n.	1.	A coming or happening; as, the occurence of a railway collision. Voyages detain the mind by the perpetual occurrence and expectation of something new. - I. Watts.
	2.	Any event or incident; esp., one which happens without being designed or expected; as, an unusual occurrence, or the ordinary occurrences of life. All the occurrence of my fortune. - Shak.

Noun	1.	occurrence - an event that happens Synonyms: happening, natural event
	2.	occurrence - an instance of something occurring; "a disease of frequent occurrence"; "the occurrence (or presence) of life on other planets"

accessibility, actual presence, adventure, affair, apparition, appearance, appearing, arising, availability, avatar, being, being here, being there, chance, circumstance, coming, coming into being, coming-forth, condition, conjuncture, contingency, development, disclosure, emergence, emergency, ens, entity, epiphany, esse, essence, eventuality, exigency, existence, experience, exposure, fact, forthcoming, frequency, go, hap, happenstance, hereness, immanence, immediacy, incarnation, incidence, incident, indwellingness, inherence, instance, issuance, juncture, life, likelihood, manifestation, materiality, materialization, materializing, matter, matter of fact, occasion, opening, particular, pass, phenomenon, physical presence, presence, presentation, rate, reality, realization, revelation, rise, rising, showing, showing forth, situation, spiritual presence, state, subsistence, substantiality, theophany, thereness, thing, turn of events, ubiety, unfolding, unfoldment, whereness