Answer: biennia

AnswerCrossword Clue
BIENNIATwo-year periods
BIENNIATwo-year stretches
BIENNIAPeriods between Winter and Summer Olympics
BIENNIACongressional terms, e.g.
BIENNIAStretches between Ryder Cups
BIENNIARepresentatives' term lengths
bienniaperiod of two years
bienniaBIENNIUM, a period of two years