quirk vs strength

quirk

verb
  • To (cause to) move with a wry jerk. 

  • To furnish with a quirk or channel. 

noun
  • An acute angle dividing a molding; a groove that runs lengthwise between the upper part of a moulding and a soffit. 

  • An idiosyncrasy; a slight glitch, mannerism; something unusual about the manner or style of something or someone. 

strength

noun
  • The intensity of a force or power; potency. 

  • The quality or degree of being strong. 

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

  • A positive attribute. 

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