convulsion vs dyscrasy

convulsion

noun
  • An uncontrolled fit, as of laughter; a paroxysm. 

  • An intense, paroxysmal, involuntary muscular contraction. 

  • Violent turmoil. 

dyscrasy

noun
  • A bodily disorder; an imbalance of the humours 

  • Disharmony 

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