hell-bent vs lackadaisical

hell-bent

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

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

lackadaisical

adj
  • Showing no interest, vigor, determination, or enthusiasm. 

  • Lazy; slothful; indolent. 

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