Crossword Clue:

a period of five years

AnswerCrossword Clue
LUSTRUMPeriod of five years.
DECADEA certain period of years.
CHILIADPeriod of a thousand years.
TRICENTENARYRelating to a period of 300 years
OCTAETERICRelating to a period of eight years.
LUSTRUMFive-year period
PENTADFive-year period
LUSTRUMFive-year period.
DAYSHIFTNine-to-five work period, say