It is possible that the diet you have does not have enough iron bearing food in it. If that isn't the reason you should ask your doctor.
a quarter of a year
Quarterly.Quarterly.Quarterly.Quarterly.
42 months
Three months.
Three months is one fourth of a year: 0.25
Quarterly.
Quarterly
Every three months
Every three months is called a quarter. And there are four quarters in a year.
seasonal change
To be on the safe side, you should change your email password every three months. Some email programs are more secure than others. Most of them suggest changing it every three months on average.
Change oil every three months
Yes
a quarter of a year
Every three months
Quarterly
yes 12 months = 1 year = 4 x 3