How many movies have Jaroslav Kotlant and Jindřich Novotný collaborated on?

They have worked on 9 movies together! Their first movie together was Slyšte je pilně a neomylně... (1968) while their highest rated movie together was Nebožtíci na bále (1980). They have not worked together since Smeč (1983). They are most known for their comedy films together.