How many movies have Franco Franchi and Graziano Fabiani collaborated on?

They have worked on 4 movies together! Their first movie together was I due della F. 1 alla corsa più pazza, pazza del mondo (1971) and was their highest rated movie together. They have not worked together since Two Cat O'Nine Tails… and a Half, in Amsterdam (1972). They are most known for their comedy films together.