For how many seasons did the coach, who developed the 46 defense, coach?
46 defense:  The 46 defense was originally developed and popularized with the Chicago Bears by their defensive coordinator Buddy Ryan, who later became head coach of the Philadelphia Eagles and Arizona Cardinals. Buddy Ryan:  During his 35-season coaching career, Ryan served as the head coach of the Philadelphia Eagles and Arizona Cardinals, and the defensive coordinator of the Chicago Bears and Houston Oilers of the NFL.
35-season