How many movies have Jaroslav Tryzna and Štěpán Kopecký collaborated on?

They have worked on 9 movies together! Their first movie together was Hrdina jedné noci (1935) while their highest rated movie together was The World Belongs to Us (1937). They have not worked together since Děvče z předměstí anebo Všecko příjde na jevo (1939). They are most known for their comedy films together.