Many, many years ago, in the late 70s and early 80s, I along with two others used to clear houses of ghosts. Back then there was no specific term for what we did. Call it ghost hunting, ghost busting (long before Bill Murray et all made Ghostbusters in 1984), house cleansing, or even house exorcists. We went in where there was a reported disturbance and did our best to determine what the cause was. Depending on the decision of the residents, we might be asked to send the spirit or spirits on to where they needed to be. The three of us were actually pretty good at it. Even when it became just two of us, we still got the job done.