appease vs madden

appease

verb
  • To make quiet; to calm; to reduce to a state of peace; to dispel (anger or hatred). 

  • To come to terms with; to adapt to the demands of. 

madden

verb
  • To make angry. 

  • To make insane; to inflame with passion. 

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