busk vs mast

busk

verb
  • To tack, cruise about. 

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

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

  • A corset. 

mast

verb
  • To supply and fit a mast to (a ship). 

  • To feed on forest seed or fruit. 

  • To produce a very large quantity of fruit or seed in certain years but not others. 

noun
  • A tall, slim post or tower, usually tapering upward, used to support, for example, sails or observation platforms on a ship, the main rotor of a helicopter, flags, floodlights, meteorological instruments, or communications equipment, such as an aerial, usually supported by guy-wires (except in the case of a helicopter). 

  • The fruit of forest-trees (beech, oak, chestnut, pecan, etc.), especially if having fallen from the tree, used as fodder for pigs and other animals. 

  • A non-judicial punishment ("NJP"); a disciplinary hearing under which a commanding officer studies and disposes of cases involving those under his command. 

  • The anabolic steroid Drostanolone propionate, also known as Masteron 

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