alternately

adverb3

1. •
   In reciprocal succession; succeeding by turns; in alternate order.

   • Driving downtown is restricted to bikes with odd and even license plate numbers alternately by day of the month.
2. •
   (US, nonstandard) Alternatively.

   • Westerners have never quite understood the reverence in Japan for fugu, alternately known in English as puffer fish, globefish or blowfish, of the family Tetraodontidae. — 2020
3. •
   By alternation; when, in a proportion, the antecedent term is compared with antecedent, and consequent.