boondoggle vs while away

boondoggle

verb
  • To waste time on a pointless activity. 

noun
  • A waste of time and/or money; a pointless activity. 

  • A braided ring to hold a neckerchief. 

while away

verb
  • To spend (time) idly but pleasantly 

  • To elapse, to pass. 

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