appeasement vs peacebuilding

appeasement

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

peacebuilding

noun
  • The creation of peace or the conditions for peace. 

  • The reconstruction of physical and societal institutions after a conflict 

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