cotter pin vs snare

cotter pin

noun
  • A pin or wedge inserted through a slot to hold machine parts together; a cotter. 

  • A split pin, the ends of which project through an object being fastened and are bent back to hold it in place. 

snare

noun
  • A trap (especially one made from a loop of wire, string, or leather). 

  • A set of stiff wires held under tension against the lower skin of a drum to create a rattling sound. 

  • A similar looped instrument formerly used to remove tumours etc. 

  • A mental or psychological trap. 

  • A snare drum. 

  • A loop of cord used in obstetric cases, to hold or to pull a fetus from the mother animal. 

verb
  • To catch or hold, especially with a loop. 

  • To ensnare. 

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