"annually" in the adverb sense
1. annually, yearly, every year, each year
without missing a year
"they travel to China annually"
2. per annum, p.a., per year, each year, annually
by the year every year (usually with reference to a sum of money paid or received
"he earned $100,000 per annum"
"we issue six volumes per annum"
Source: WordNet® (An amazing lexical database of English)
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