frequency of occurrence; incidence rate
Technical and formal term used in statistics, epidemiology, engineering, and similar fields to describe how often an event or phenomenon occurs.
The frequency of earthquake occurrence is high in this region.
We compiled the incidence rates into a graph.
頻度 is a general term for 'frequency', while 発生頻度 specifically refers to the frequency of occurrence or incidence of events.
発生率 is 'incidence rate' often expressed as a proportion or percentage, whereas 発生頻度 can be a count or rate without necessarily being a ratio.
Compound of 発生 (occurrence) and 頻度 (frequency).