This is different for every couple. Some people are of different ages, some are younger, and they are married many times a week, once a day or two or three times a day in the first few years, but the older ones may be once a week or once every two weeks. This is determined by everyone's different physical conditions, different interests in this gender and different sexual desires. It is not a stereotype, nor is it a real rule. It is suggested to choose a regular hospital for diagnosis and treatment and take medicine according to the doctor's advice so as not to delay the illness.
If you still don't understand, please keep asking questions. I wish you good health!