dyscrasia vs dyscrasy

dyscrasia

noun
  • Imbalance of the four bodily humors (blood, black and yellow bile, phlegm) that was thought to cause disease. 

  • Any bodily disorder, especially regarding the blood. 

dyscrasy

noun
  • A bodily disorder; an imbalance of the humours 

  • Disharmony 

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