Annually means once every year. Reviewed annually, paid annually, meets annually.
It is the standard word of contracts and reports, where a figure quoted annually can be compared with any other. Per annum means the same and is used chiefly of money.
1adverbannuallyOnce every year.
“The festival is held annually in the first week of July.”
annually is a frequency.
Latin
annuālem
English
annual
English, today
annually
Built from
From annual + -ly. annual First attested around 1382, borrowed from Latin annuālem, annuālis, related to Latin annālis, adjective form of annus (“year”). Used to categorize plants since 1710.
Etymology from Wiktionary, CC BY-SA