assuagement vs suasion

assuagement

noun
  • The condition of being assuaged. 

  • An assuaging medicine or application. 

  • The action of assuaging; appeasement. 

suasion

noun
  • The act of urging or influencing; persuasion. 

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