clarity vs stigma

clarity

noun
  • The ability to be easily understood. 

  • The state or measure of being clear, either in appearance, thought or style; lucidity. 

stigma

noun
  • A mark on the body corresponding to one of the wounds of the Crucifixion on Jesus' body, and sometimes reported to bleed periodically. 

  • A mark of infamy or disgrace. 

  • A scar or birthmark. 

  • A visible sign or characteristic of a disease. 

  • An outward sign; an indication. 

  • A ligature of the Greek letters sigma and tau, (Ϛ/ϛ). 

  • The sticky part of a flower that receives pollen during pollination. 

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