gallery vs terracing

gallery

noun
  • A roofed promenade, especially one extending along the wall of a building and supported by arches or columns on the outer side 

  • An establishment that buys, sells, and displays works of art. 

  • A part of a monocle, a projection off the ring holding the lens, which helps secure the monocle in the eye socket. 

  • The uppermost seating area projecting from the rear or side walls of a theater, concert hall, or auditorium. 

  • The spectators of an event, collectively. 

  • A browsable collection of images, font styles, etc. 

  • The production control room. 

  • The boring trails produced by an insect in wood. 

  • The, often elevated and in the rear, part of a courtroom where seating for the public audience is facilitated during trial. 

  • A channel that carries engine oil to parts of the engine that need lubrication, such as the main bearings. 

  • An institution, building, or room for the exhibition and conservation of works of art. 

  • A level or drive in a mine. 

  • A covered passage cut through the earth or masonry. 

verb
  • To show off. 

terracing

noun
  • A terraced structure. 

  • A series of terraces. 

  • A stand with a series of tiers. 

  • The formation of terraces. 

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