The phrase "infrequent periods" refers to the condition when a person's menstruation cycle does not occur regularly or happens only occasionally. Full definition
This is known as oligomenorrhea, which refers to infrequent periods with intervals of more then 35 days. (maryvancenc.com)
For many women with PCOS, that means infrequent periods: For adults with the syndrome, periods typically occur at least 35 days apart. (health.com)
What's even cooler is that rhodiola has been shown to be effective for adrenal fatigue, lack of ovulation and irregular / infrequent periods [3]! (nicolejardim.com)