adze vs colter

adze

noun
  • A cutting tool that has a curved blade set at a right angle to the handle and is used in shaping wood. 

verb
  • To shape a material using an adze. 

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 adze and colter occurred in a corpus of books? (source: Google Ngram Viewer )