appeasement vs estrangement

appeasement

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

estrangement

noun
  • The state of being alien; foreign, non-native. 

  • The act of estranging; the act of alienating; alienation. 

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