aggression vs appeasement

aggression

noun
  • Hostile or destructive behavior or actions. 

  • The practice or habit of launching attacks. 

  • The act of initiating hostilities or invasion. 

appeasement

noun
  • The state of being appeased; the policy of giving in to demands in order to preserve the peace. 

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