sawdust vs woodchip

sawdust

noun
  • The fine particles (dust) created by sawing wood or other material. 

verb
  • To sprinkle with sawdust. 

woodchip

noun
  • A small mechanically produced piece (chip) of wood, generally from 0.5 to 10 cm in diameter, used primarily as raw material for pulp, paper and construction boards, as well as fuel and mulch. 

  • A small fibre of wood; especially such material as used to make ingrain wallpaper, aka woodchip wallpaper. See Wikipedia article on ingrain wallpaper. 

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