cantilever vs girder

cantilever

noun
  • A beam anchored at one end and projecting into space, such as a long bracket projecting from a wall to support a balcony. 

  • A beam anchored at one end and used as a lever within a microelectromechanical system. 

  • A technique, similar to the spread eagle, in which the skater travels along a deep edge with knees bent and bends their back backwards, parallel to the ice. 

verb
  • To project (something) in the manner of or by means of a cantilever. 

girder

noun
  • A beam of steel, wood, or reinforced concrete, used as a main horizontal support in a building or structure. 

  • One who girds; a satirist. 

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