moderation vs radicalism

moderation

noun
  • The state or quality of being moderate; avoidance of extremes 

  • An instance of moderating: bringing something away from extremes, especially in a beneficial way 

  • The process of moderating a discussion 

radicalism

noun
  • Any of various radical social or political movements that aim at fundamental change in the structure of society 

How often have the words moderation and radicalism occurred in a corpus of books? (source: Google Ngram Viewer )