clog vs woodchip

clog

noun
  • A weight, such as a log or block of wood, attached to a person or animal to hinder motion. 

  • That which hinders or impedes motion; an encumbrance, restraint, or impediment of any kind. 

  • A type of shoe with an inflexible, often wooden sole sometimes with an open heel. 

  • A blockage. 

  • A shoe of any type. 

verb
  • To block or slow passage through (often with 'up'). 

  • To burden; to trammel; to embarrass; to perplex. 

  • To enforce a mortgage lender right that prevents a borrower from exercising a right to redeem. 

  • To encumber or load, especially with something that impedes motion; to hamper. 

  • To perform a clog dance. 

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 clog and woodchip occurred in a corpus of books? (source: Google Ngram Viewer )