fuel-saving vs profligate

fuel-saving

profligate

adj
  • Inclined to waste resources or behave extravagantly. 

  • Immoral; abandoned to vice. 

noun
  • An overly wasteful or extravagant individual. 

  • An abandoned person; one openly and shamelessly vicious; a dissolute person. 

How often have the words fuel-saving and profligate occurred in a corpus of books? (source: Google Ngram Viewer )