Which guest star appeared in the most NBC Mystery Movies during the 1970s?

There was Columbo, McCloud, McMillan and Wife were the well known ones.

You had Hec Ramsey, Banacek, Cool Million, Madigan, Faraday and Company, Tenafly, Snoop Sisters, Amy Prentiss, McCoy, Quincy, Lanigan's Rabbi.

I was wondering because I noticed that Jessica Walters when I looked at IMDB was in Columbo, Banacek, Tenafly, Amy Prentiss as the main character, McCloud and McMillan and Wife.