busk vs jettison

busk

noun
  • A strip of metal, whalebone, wood, or other material, worn in the front of a corset to stiffen it. 

  • A corset. 

verb
  • To solicit money by entertaining the public in the street or in public transport. 

  • To tack, cruise about. 

jettison

noun
  • Items that have been or are about to be ejected from a boat or balloon. 

  • The action of jettisoning items. 

verb
  • To eject from a boat, submarine, aircraft, spaceship or hot-air balloon, so as to lighten the load. 

  • To let go or get rid of as being useless or defective. 

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