indigestible vs scorching

indigestible

adj
  • Difficult to accept; unpalatable. 

  • Difficult or impossible to digest. 

noun
  • Anything that is difficult to digest. 

scorching

adj
  • Bitterly sarcastic; scathing; withering. 

  • very high. 

  • Very hot. 

noun
  • The act or result of something being scorched. 

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