How many movies have Jana Altmannová and Milan Dvořák collaborated on?

They have worked on 4 movies together! Their first movie together was Co je doma to se počítá, pánové... (1980) while their highest rated movie together was Příště budeme chytřejší, staroušku! (1982). They have not worked together since Kdo probudí Pindruše ...? (1989). They are most known for their comedy films together.