How many movies have Peter Fricke and Ruth-Maria Kubitschek acted in together?

They have worked on 4 movies together! Their first movie together was Das Attentat - L.D. Trotzki (1967) while their highest rated movie together was Zwei Väter einer Tochter (2003). They have not worked together since Frechheit siegt (2004). They are most known for their comedy films together.