How many movies have Bettina Böhler and Irmgard Freifau von Berswordt-Wallrabe collaborated on?

They have worked on 2 movies together! Their first movie together was Terror 2000 (1992) while their highest rated movie together was The 120 Days of Bottrop (1997). They have not worked together since The 120 Days of Bottrop (1997).