Occurrence
来自Big Physics
mid 16th century: probably from the plural of archaic occurrent, in the same sense, via French from Latin occurrent- ‘befalling’, from the verb occurrere (see occur).
wiktionary
From Middle French occurrence, from Medieval Latin occurrentia.
Morphologically occur + -ence.
etymonline
occurrence (n.)
"that which presents itself, that which happens without design or expectation," 1530s, from French occurrence "unexpected happening" or directly from Medieval Latin occurrentia, from Latin occurentem (nominative occurens), present participle of occurrere (see occur). The adjective occurrent "occurring, happening, incidental" (mid-15c.) is long obsolete.
