Every three months is called a quarter. And there are four quarters in a year.
Every one third of a year.
Semester
In 2013, four of them do.It's not the same every year.
we have a semiannual banquet for our club that happens every 6 months
Quarterly (in other words 12 months divided by 4)
Every three months is called a quarter. And there are four quarters in a year.
every four months
Quarter. At every Quarter of the financial year (every 3 months).
bimonthly
Every one third of a year.
your blood cells
Quarterly
Semester
Shifts is a verb in that sentence. Since "experiences" is plural, the verb should be "shift".
In 2013, four of them do.It's not the same every year.
for about 5 to 6 months