ailing vs dyscrasia

ailing

noun
  • An ailment. 

adj
  • Sickly; sick; ill; unwell. 

dyscrasia

noun
  • Any bodily disorder, especially regarding the blood. 

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

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