English → French
occurrence /BrE əˈkʌr(ə)ns 
, AmE əˈkərəns /
noun
1 (event) fait m
to be a rare/regular/daily occurrence se produire rarement/régulièrement/tous les jours
an unfortunate occurrence une affaire malencontreuse
2 (instance) occurrence f (of de)
3 (presence) (of disease, phenomenon) cas m; (of species) apparition f