It’s going to vary with individual situations: children or no children and how many, work schedules, sleep patterns, age, length of marriage, and so on and so forth, etc. etc. etc.
But I think that if the couple is abstining from relations during the fertile period, it kinda goes against the whole spirit of NFP to try to compensate by overdoing things during the infertile periods. Relations during those periods should not be a burden. They should just be at the “normal” pace for the couple.
It would be like overeating after a day of fasting. When the fast is over, you should just go back to normal eating.