How many movies have Pietro Grifi and Sandro Borni collaborated on?

They have worked on 4 movies together! Their first movie together was Il mio amico Benito (1962) while their highest rated movie together was Totò e Peppino divisi a Berlino (1962). They have not worked together since Questo pazzo, pazzo mondo della canzone (1964). They are most known for their comedy films together.