biannually

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bi·an·nu·al

B0226300 (bī-ăn′yo͞o-əl)adj.1. Occurring twice each year; semiannual.2. Occurring every two years; biennial.
bi·an′nu·al·ly adv.
Thesaurus
Adv.1.biannually - twice a year; "we hold our big sale biannually"
Translations
due volte l'anno