How many movies have B. S. Ranga and Chittoor V. Nagayya collaborated on?

They have worked on 4 movies together! Their first movie together was Tenali Ramakrishna (1956) while their highest rated movie together was Mahishasura Mardini (1959). They have not worked together since Pattikattu Ponnaiya (1973). They are most known for their drama films together.