gradualmente angolul

gradually▼(in gradual manner)
adverb
[UK: ˈɡræ.dʒʊə.li] [US: ˈɡræ.dʒuːə.li]The train gained speed gradually. = Il treno accelerò gradualmente.

step by step▼(gradually)
adverb
[UK: step baɪ step] [US: ˈstep baɪ ˈstep]