grazer vs reaper

grazer

noun
  • One who or that which grazes, in any sense. 

  • A television viewer with a short attention span who switches between channels regularly. 

  • An animal that grazes. 

reaper

noun
  • One who reaps; a person employed to harvest crops from the fields by reaping. 

  • The recluse spider (Loxosceles and Sicarius spp.). 

  • A machine used to harvest crops. 

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