heckling vs kidology

heckling

noun
  • The act of one who heckles. 

  • The preparation of flax for spinning using special combs called hackles. 

kidology

noun
  • The art of kidding, teasing mocking. 

  • Studied deception. 

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