How many movies have Frederic Zelnik and Josef Commer collaborated on?

They have worked on 3 movies together! Their first movie together was Leichtsinn und Genie (1919) while their highest rated movie together was Die Geliebte des Grafen Varenne (1921). They have not worked together since Die Geliebte des Grafen Varenne (1921). They are most known for their drama films together.