ferrule vs mast

ferrule

verb
  • To equip with a ferrule. 

noun
  • The plastic band attaching the tip to the cue. 

  • The pinched metal band which holds the bristles of a paintbrush to the shaft. 

  • The metal spike at the end of the shaft of an ice axe. 

  • A band or cap (usually metal) placed around a shaft to reinforce it or to prevent splitting. 

  • A bushing for securing a pipe joint. 

  • A metal sleeve placed inside a gutter at the top. 

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 ferrule and mast occurred in a corpus of books? (source: Google Ngram Viewer )