auger vs borer

auger

noun
  • A tool used to bore holes in the ground, e.g. for fence posts 

  • A snake or plumber's snake (plumbing tool). 

  • A hollow drill used to take core samples of soil, ice, etc. for scientific study. 

  • A carpenter's tool for boring holes longer than those bored by a gimlet. 

verb
  • To use an auger; to drill a hole using an auger. 

  • To proceed in the manner of an auger. 

borer

noun
  • A tool used for drilling. 

  • A person who bores or drills; a person employed to drill bore holes. 

  • A cyclostome, such as a hagfish, which bores into injured, dead, or decaying sea creatures to feed on their flesh. 

  • One of the many types of mollusc that bore into soft rock. 

  • A knife fit for a stabbing. 

  • A tedious person; a person who bores others; a bore. 

  • An insect or insect larva that bores into wood. 

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