This is the 450th most frequent Persian word.
وقوع
Occurrence.
The word 'وقوع' refers to the 'occurrence' or 'happening' of an event, used here to describe an unexpected incident.
وقوع حادثه در آن منطقه بدون هشدار بود.
The occurrence of the incident in that area was without warning.
The word 'وقوع' is used to express the happening of a significant event, in this case, an earthquake.
وقوع زلزله باعث تخریب بسیاری از ساختمانها شد.
The occurrence of the earthquake caused the destruction of many buildings.
In this sentence, 'وقوع' denotes the happening or realization of a notable historical event.