hellacious vs shocking

hellacious

adj
  • horrible, awful, hellish, agonizing 

  • nasty, repellent. 

  • Remarkable, unbelievable, unusual. 

shocking

adj
  • Extremely bad. 

  • Inspiring shock; startling. 

  • Unusually obscene or lewd. 

noun
  • The application of an electric shock. 

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