Show a slide every nth time through the show?

I have a power point that is displayed all day everyday on monitors in the facility. (Looping) I am going to insert a rather long video in the PP show and am wondering if I can skip the slide with the video except every 3rd time through the show. I know I could make the show three times longer and repeat the other slides in the same show but I was wondering if there is a “slicker” solution.
Thanks for your time!