In a month, four weeks pass.
If something happens twice a month it is called biweekly because it happens every other week and a month has 4 weeks. there is also bimonthly which is every other month but not really a direct word for something that happens twice a month.
it happens in leap year and the month is feburary
The only thing that happens exactly one month befor a woman's period is her previous period.
dushera
That there's a one-month countdown until something happens.
Twice a month means that something happens two times in one month, usually on a regular schedule.
bi-monthly
One of this wrestlers is on his.
It begins in December
semimonthly
your hands get dirty
The first of a lunar month.