nobility vs rectitude

nobility

noun
  • The quality of being noble. 

  • A noble or privileged social class, historically accompanied by a hereditary title; aristocracy. 

rectitude

noun
  • Conformity to the rules prescribed for moral conduct; (moral) uprightness, virtue. 

  • Straightness; the state or quality of having a constant direction and not being crooked or bent. 

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