How many movies have Charles H. Schram and George R. Nelson collaborated on?

They have worked on 4 movies together! Their first movie together was Carnal Knowledge (1971) while their highest rated movie together was The Godfather 1901–1959: The Complete Epic (1981). They have not worked together since The Godfather 1901–1959: The Complete Epic (1981). They are most known for their drama films together.