cog vs rivet

cog

noun
  • A gear; a cogwheel. 

  • One of the rough pillars of stone or coal left to support the roof of a mine. 

  • A tooth on a gear. 

  • A projection or tenon at the end of a beam designed to fit into a matching opening of another piece of wood to form a joint. 

  • A small fishing boat. 

  • A trick or deception; a falsehood. 

  • A clinker-built, flat-bottomed, square-rigged mediaeval ship of burden, or war with a round, bulky hull and a single mast, typically 15 to 25 meters in length. 

  • An unimportant individual in a greater system. 

verb
  • To furnish with a cog or cogs. 

  • To seduce, or draw away, by adulation, artifice, or falsehood; to wheedle; to cozen; to cheat. 

  • To cheat; to play or gamble fraudulently. 

  • Of an electric motor or generator, to snap preferentially to certain positions when not energized. 

  • To plagiarize. 

  • To load (a die) so that it can be used to cheat. 

  • To obtrude or thrust in, by falsehood or deception; to palm off. 

rivet

noun
  • A cylindrical mechanical fastener that attaches multiple parts together by fitting through a hole and deforming the head(s) at either end. 

  • Any fixed point or certain basis. 

verb
  • To command the attention of. 

  • To attach or fasten parts by using rivets. 

  • To make firm or immovable. 

  • To install rivets. 

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