dyscrasy vs thigh-slapper

dyscrasy

noun
  • A bodily disorder; an imbalance of the humours 

  • Disharmony 

thigh-slapper

noun
  • A joke, especially one which strikes the listener or reader as particularly humorous. 

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