jig vs trepan

jig

noun
  • An apparatus or machine for jigging ore. 

  • A type of lure consisting of a hook molded into a weight, usually with a bright or colorful body. 

  • A dance performed by one or sometimes two individual dancers, as opposed to a dance performed by a set or team. 

  • A light, brisk musical movement; a gigue. 

  • A lively dance in 6/8 (double jig), 9/8 (slip jig) or 12/8 (single jig) time; a tune suitable for such a dance. By extension, a lively traditional tune in any of these time signatures. Unqualified, the term is usually taken to refer to a double (6/8) jig. 

  • A device in manufacturing, woodworking, or other creative endeavors for controlling the location, path of movement, or both of either a workpiece or the tool that is operating upon it. Subsets of this general class include machining jigs, woodworking jigs, welders' jigs, jewelers' jigs, and many others. 

verb
  • To move with a skip or rhythm; to move with vibrations or jerks. 

  • To move briskly, especially as a dance. 

  • To sing to the tune of a jig. 

  • To fish with a jig. 

  • To trick or cheat; to cajole; to delude. 

  • To cut or form, as a piece of metal, in a jigging machine. 

  • To sort or separate, as ore in a jigger or sieve. 

trepan

noun
  • A tool used to bore through rock when sinking shafts. 

  • A surgical instrument used to remove a circular section of bone from the skull; a trephine. 

verb
  • To create a large hole by making a narrow groove outlining the shape of the hole and then removing the plug of material remaining by less expensive means. 

  • To use a trepan; to trephine. 

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