cafne -caf- gismu

x₁ (event) often/frequently/commonly/customarily occurs/recurs by standard x₂.

See also rirci, fadni, kampu, rapli, krefu, lakne, cmavo list piso'iroi and similar compounds.

In notes:

fadni: x₁ [member] is ordinary/common/typical/usual in property x₂ (ka) among members of x₃ (set).
kampu: x₁ (property - ka) is common/general/universal among members of set x₂ (complete set).
krefu: x₁ (event) is the x₃'rd recurrence/repetition of x₂ (abstract); x₂ happens again in [form] x₁.
lakne: x₁ (event/state/property) is probable/likely under conditions x₂.
rapli: x₁ [action] repeats/is repeated for a total of x₂ (quantity) occurrences.
rirci: x₁ [member] is rare/unusual/uncommon/atypical in property x₂ (ka) among members of x₃ (set).
selcafne: x₂=c₁ (event) often/frequently/commonly/customarily occurs/recurs by standard x₁=c₂.