chisel vs colter

chisel

noun
  • A cutting tool used to remove parts of stone, wood or metal by pushing or pounding the back when the sharp edge is against the material. It consists of a slim, oblong block of metal with a sharp wedge or bevel formed on one end and sometimes a handle at the other end. 

  • Gravel. 

  • Coarse flour; bran; the coarser part of bran or flour. 

verb
  • To cheat, to get something from (someone) by cheating. 

  • To use a chisel. 

  • To work something with a chisel. 

colter

noun
  • A knife or cutter attached to the beam of a plow to cut the sward, in advance of the plowshare and moldboard. 

  • The part of a seed drill that makes the furrow for the seed. 

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