How common were witches in shakespeares time?

There were no real witches in Shakespeare's time, because they don't exist!

But, there is no exact figure as to how many women were thought to be witches. There were apparently thousands of them around!

If a woman was seen to own a black cat, or if she made special herbal medicines, then she was seen as a witch.

There were witch-hunts, and around 16000 (sixteen thousand) women were killed because they were thought to be witches. (They were burned at the stake, or drowned.)

Hope I helped you! :)