How many movies have N Sankaran Nair and Thikkurissy Sukumaran Nair collaborated on?

They have worked on 4 movies together! Their first movie together was Vishnu Vijayam (1974) while their highest rated movie together was Madanolsavam (1978). They have not worked together since Ee Ganam Marakkumo (1978). They are most known for their drama films together.