How many movies have František Procházka and Ludmila Hrubá collaborated on?

They have worked on 3 movies together! Their first movie together was Dvě Cecilky (1969) while their highest rated movie together was Žabí muzikál (1971). They have not worked together since O hradu Zásadce a turecké vojně (1971). They are most known for their fantasy films together.