complacency vs smugness

complacency

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

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

smugness

noun
  • The result or product of being smug. 

  • The state or quality of being smug. 

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