What do you call 5 movies in a series?

Excuse me, could you please clarify for me? When we're referring to a collection of five movies that are part of a larger narrative or universe, what do we typically call such a grouping? Is there a specific term used in the film industry or among movie enthusiasts to describe this kind of series? I'm curious to know the accurate terminology for referring to five movies that are sequentially related in a series.