Synonyms and antonyms of Happening at particular intervals of time in American Thesaurus

alternate (adjective)

happening on one day, week, etc. but not on the day, week, etc., that immediately follows

a month at a time ()

for one whole month each time

annually (adverb)

once every year

an/per hour ()

at a rate based on an hour of a particular activity

biennial (adjective)

a biennial event happens once every two years

bimonthly (adjective)

happening or produced twice a month or every two months

circadian (adjective)

relating to a period of 24 hours, especially to the changes in people’s or animals’ bodies that happen during this period

daily (adjective)

done or happening every day

daily (adverb)

every day

diurnal (adjective)

very formal happening every day

half-hourly (adjective)

happening every 30 minutes

hourly (adjective)

happening once every hour

hourly (adverb)

once every hour

monthly (adjective)

happening or published once a month

night after night ()

every night for a long period of time

nightly (adjective)

happening every night

once a week/month/year etc. ()

happening one time each week/month/year etc.

once every three days/four years etc. ()

happening one time every three days/four years etc.

semiweekly (adjective)

happening twice a week

triennial (adjective)

happening every three years

week in (and) week out ()

every week for a long time

year on year ()

used for talking about situations in which something continues to change or develop every year