occasionnel înseamnă în Engleză

occasional▼◼◼◼(limited to certain occasions; not very often)
adjective
[UK: əˈk.eɪ.ʒən.l̩] [US: əˈk.eɪ.ʒən.l̩]It was cloudy, with occasional rain. = C'était nuageux, avec de la pluie occasionnelle.

casual▼◼◼◼(coming without regularity; occasional or incidental)
adjective
[UK: ˈkæ.ʒʊəl] [US: ˈkæ.ʒə.wəl]

occasionally▼◼◼◼(from time to time; now and then; once in a while; at infrequent intervals)
adverb
[UK: əˈk.eɪ.ʒə.nə.li] [US: əˈk.eɪ.ʒə.nə.li]That does happen occasionally. = Cela arrive occasionnellement.