How many movies have Fritiof Billquist and Nils "Knas" Ohlson acted in together?

They have worked on 3 movies together! Their first movie together was Loffe blir polis (1950) while their highest rated movie together was 91:an Karlssons bravader (1951). They have not worked together since 91:an Karlsson muckar (tror han) (1959).