How many movies have František Čížek and Oldřich Velen collaborated on?

They have worked on 19 movies together! Their first movie together was Jak se Franta naučil bát (1959) while their highest rated movie together was Marecek, Pass Me the Pen! (1976). They have not worked together since Hearty Greetings from the Globe (1983). They are most known for their comedy films together.