coercion vs necessitation

coercion

noun
  • Use of physical or moral force to compel a person to do something, or to abstain from doing something, thereby depriving that person of the exercise of free will. 

  • A specific instance of coercing. 

  • Actual or threatened force for the purpose of compelling action by another person; the act of coercing. 

  • Conversion of a value of one data type to a value of another data type. 

  • The process by which the meaning of a word or other linguistic element is reinterpreted to match the grammatical context. 

necessitation

noun
  • Necessity, understood as a logical or other philosophical principle, or as a law or force of nature. 

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