exert vs laze

exert

verb
  • To make use of, to apply, especially of something non-material. 

  • To put in vigorous action. 

laze

verb
  • To be lazy, waste time. 

  • To pass time relaxing; to relax, lounge. 

noun
  • An instance of lazing. 

  • Laziness. 

  • Acidic steam created when super-hot lava contacts salt water. 

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