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Biannual is often confused as meaning "once every two years" when in fact it's defintiion is "Occuring twice a year."

Bi and Semi annual mean the same thing.

Biennial actually means "Occuring once every two years."

Source: Archer S04E05

Biannual is often confused as meaning "once every two years" when in fact it's defintiion is "Occuring twice a year." Bi and Semi annual mean the same thing. Biennial actually means "Occuring once every two years." Source: Archer S04E05

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