complacency vs gratification

complacency

noun
  • A feeling of contented self-satisfaction, especially when unaware of upcoming trouble. 

  • Passivity as a result of contentment with the current situation. 

gratification

noun
  • A feeling of pleasure; satisfaction. 

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

  • A gratuity; a reward. 

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