How many movies have Gerd Frickhöffer and Raimund Rosenberger collaborated on?

They have worked on 6 movies together! Their first movie together was Frau Irene Besser (1961) while their highest rated movie together was Charleys Onkel (1969). They have not worked together since Auch ich war nur ein mittelmäßiger Schüler (1974). They are most known for their comedy films together.