pitcher hitting batters with pitch(softball)

Question
How many times can a fast pitch softball pitcher hit batters during a game before being removed from the mound?

Answer
There is no set number of how many times a pitcher can hit a batter. If the umpire deems that the pitcher is doing it on purpose then there will be one warning and then an ejection.

The biggest factor in this is the pitcher's coach. If i'm coaching i'm pulling the pitcher after 3 or 4 HBPs.