kill time vs laze

kill time

verb
  • To engage in an activity whose only purpose is to make the time seem to pass more quickly; to fill the time between activities. 

laze

verb
  • To pass time relaxing; to relax, lounge. 

  • To be lazy, waste time. 

noun
  • An instance of lazing. 

  • Laziness. 

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

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