What if you use an actor or actress that you cast in a story, you could check a most used actor list to let yourself know how many times did you use the actor before.

Inspiration:
Production Posse- A group of people that, whenever one is involved in a production, others are almost guaranteed to show up at some point.This used to be a very enforced part of media making. Studios expected artists to specialize into units. An example would be John Ford being specialized in westerns, which meant that large parts of the crew—both in front of and behind the camera—would literally always work together. Another aspect of Hollywood filmmaking which used to enforce this in the past was that studios would often have exclusive contracts with big names spanning several years and movies.