Words Indicating Time Periods And Time Intervals
Here is a list of words used to indicate time periods and time intervals.
Time periods
Bicentennial: A period of 200 years
Biennial: A period of 2 years
Century: A period of 100 years
Decade: A period of 10 years
Centennial: Every 100 years
Decennial: Every 10 years
Leap year: A period of 366 days
Millennium: A period of 1,000 years
Month: A period of 28-31 days
Olympiad: Every 4 years
Quadrennial: Every 4 years
Quadricentennial: Every 400 years
Quincentennial: Every 500 years
Septennial: Every 7 years
Sexcentenary: A period of 600 years
Sexennial: Every 6 years
Tercentenary: A period of 300 years
Triennial: Every 3 years
Vicennial: Every 20 years
Week: 7 days
Year: 365 days
Time intervals
Annual: occurring every year
Biannual: occurring twice a year
Bimonthly: occurring every two months or twice a month
Biweekly: every two weeks or twice a week
Diurnal: daily, of each day
Perennial: lasting through a year or several years
Semi-annual: occurring twice a year
Semi-diurnal: twice a day
Semi-weekly: twice a week
Trimonthly: every three months
Triweekly: every three weeks or three times a week
Thrice weekly: three times a week
