every six months
- semiannualTwice per year
- biannualTwice per year
- twice-yearlyTwo times per annum
- half-yearlyTwice per annum
- periodicOccurring at intervals
recurring · dental · checkup · review · renewal · subscription · cycle · calendar · appointment · routine · interval · assessment · evaluation · biennial · quarterly · annual · schedule · regular
temporal frequency
every six monthsconstantly
At all times
continuously · daily · hourly · every day · weekly
regularity vs irregularity
every six monthssporadically
At irregular intervals
irregularly · randomly · unpredictably · erratically · intermittently