hell-bent vs in earnest

hell-bent

adv
  • In a recklessly determined manner; determinedly, wholeheartedly. 

adj
  • Recklessly determined to do or achieve (something). 

in earnest

adv
  • With considerable commitment, determination, or effect; significantly. 

  • Having a sincere intent. 

adj
  • Sincere; determined; truthful. 

How often have the words hell-bent and in earnest occurred in a corpus of books? (source: Google Ngram Viewer )