once a month
- monthlyOccurring each lunar cycle
- periodicOccurring at intervals
- cycleRepeating sequence of events
- calendarDate-tracking system
- routineRegular sequence of actions
subscription · period · lunar · billing · paycheck · rent · magazine · newsletter · appointment · checkup · installment · renewal · schedule · regular · recurring · frequency · interval · menstrual
frequency
once a monthconstantly
At all times
continuously · daily · every day · all the time · nonstop
regularity
once a monthrandomly
Without deliberate selection
irregularly · unpredictably · erratically · sporadically · whenever