candor vs straightness

candor

noun
  • The state of being sincere and open in speech; honesty in expression. 

  • Impartiality. 

straightness

noun
  • The result or product of being straight. 

  • The state or quality of being straight (especially in the sense of "heterosexual"). 

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