What occupation did the ancient "three aunts and six grandmothers" refer to?

Ming Dow Zong Yi's "Dropping out of Farming, Three Gu and Six Women": "Three Gu, Nun, Taoist, Guagu also; A nun refers to a woman in a temple, and a Taoist refers to a woman in a Taoist temple and an aunt who specializes in divination. Six women, tooth women, matchmaker, teacher women, devout women, medicine women and stable women. These people are not all bad elements, just because they usually have no skills, so they go deep into the family and come into contact with good women. In addition, most housewives in the past were ignorant, so "three aunts and six grandmothers" often succeeded in luring women to seek personal gain.