How many movies have Bohumil Mottl and Štěpán Kopecký collaborated on?

They have worked on 3 movies together! Their first movie together was Z bláta do louže (1934) while their highest rated movie together was Hrdinný kapitán Korkorán (1934). They have not worked together since Na Svatém Kopečku (1934). They are most known for their comedy films together.