foible vs strength

foible

noun
  • A weakness or failing of character. 

  • A quirk, idiosyncrasy, or mannerism; an unusual habit that is slightly strange or silly. 

  • Part of a sword between the middle and the point, weaker than the forte. 

strength

noun
  • The quality or degree of being strong. 

  • The intensity of a force or power; potency. 

  • The strongest part of something; that on which confidence or reliance is based. 

  • A positive attribute. 

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