appeasement vs gratification

appeasement

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

gratification

noun
  • A gratuity; a reward. 

  • The act of gratifying or pleasing, either the mind, or the appetite or taste. 

  • A feeling of pleasure; satisfaction. 

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