Time

Day (24 hours)
Week (7 days)
Thrice weekly (three times a week)
Month (28-31 days)
Bimonthly (every two months or twice a month)
Year (365 days or 12 months or 52 weeks)
Annual (every year)
Biannual (twice a year)
Biennial (2 years)
Leap year (366 days)
Decade (10 years)
Century (100 years)
Centennial (every 100 years)
Millennium (1,000 years)

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