OK so i'm 15 & i'm curious on how often ur boobs grow?

OK so i'm 15 & i'm curious on how often ur boobs grow?
The main times of breast growth and reduction are:
A) The first couple of years at the onset of puberty
B) Around "maturity" 20-25 years old
C) During pregnancy and breast feeding
D) Weight gain in body fat (growth)
E) Loosing weight, decrease in body fat ("shrink").
F) Between ovulation and first day of period slight increase due to water retention.
umm, how often?? Your boobs stop growing after about 1 and a half years after they start, they don't go through growth spurts or anything.
Your boobs grow everytime you gave birth and if you breastfeed your baby.