clevis vs hanger

clevis

noun
  • A U-shaped coupling having holes at each end, through which a bolt is run; used especially to fit attachments to a tractor or other vehicle as it allows a degree of rotation about the bolt. 

hanger

noun
  • A device secured by a bolt and used to attach a carabiner. 

  • A steep, wooded slope. 

  • A bridle iron. 

  • Synonym of spectacular mark 

  • Hunger and anger, especially when the anger is induced by the hunger. 

  • A hanging pitch; a pitch (typically a breaking ball or slider) that is poorly executed, hence easy to hit. 

  • One who hangs, or causes to be hanged; a hangman, paper hanger, etc. 

  • A person who attempts suicide by hanging. 

  • A short and broad backsword, worn so to hang at the side, especially popular in the 18th century. 

  • A strap hung to the girdle, by which a dagger or sword is suspended. 

  • A clothes hanger. 

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