auger vs drill bit

auger

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

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

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

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

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

  • To proceed in the manner of an auger. 

drill bit

noun
  • A twist drill. 

  • Any other style of cutter, for example a spade drill, that is rotated and fed in a similar manner as a twist drill to of cut a hole in metal, wood or other materials. 

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