abstention vs moderation

abstention

noun
  • The act of abstaining or refraining (from). 

  • Non-participation in the political world; as a country avoiding international affairs. 

  • The act of declining to vote on a particular issue. 

moderation

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

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

  • The process of moderating a discussion 

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