cack vs indigestible

cack

noun
  • An act of defecation. 

  • A discordant note. 

  • A squawk. 

  • Excrement. 

  • Rubbish. 

  • Penis. 

verb
  • To squawk. 

  • To laugh. 

  • To incorrectly play a note by hitting a partial other than the one intended. 

  • To defecate. 

  • To defecate (on); to shit. 

  • To kill. 

indigestible

noun
  • Anything that is difficult to digest. 

adj
  • Difficult or impossible to digest. 

  • Difficult to accept; unpalatable. 

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