candor vs honesty

candor

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

  • Impartiality. 

honesty

noun
  • The act, quality, or condition of being honest. 

  • Any of various crucifers in the genus Lunaria, several of which are grown as ornamentals, particularly Lunaria annua. 

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