blot vs stigma

blot

noun
  • A stain on someone's reputation or character; a disgrace. 

  • An exposed piece in backgammon. 

  • A blemish, spot or stain made by a coloured substance. 

  • A method of transferring proteins, DNA or RNA, onto a carrier. 

verb
  • to cause a blot (on something) by spilling a coloured substance. 

  • To obliterate, as writing with ink; to cancel; to efface; generally with out. 

  • To dry (writing, etc.) with blotting paper. 

  • To spot, stain, or bespatter, as with ink. 

  • To obscure; to eclipse; to shadow. 

  • To impair; to damage; to mar; to soil. 

  • to soak up or absorb liquid. 

  • To stain with infamy; to disgrace. 

stigma

noun
  • A mark of infamy or disgrace. 

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

  • 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 blot and stigma occurred in a corpus of books? (source: Google Ngram Viewer )