bookshelf vs sideboard

bookshelf

noun
  • A shelf or shelves for storing books for easy visual reference. 

sideboard

noun
  • A piece of dining room furniture having drawers and shelves for linen and tableware; originally for serving food. 

  • A set of cards that are separate from a player's primary deck, used to customize a match strategy against an opponent by enabling a player to change the composition of the playing deck. 

  • A restriction on using the right to catch a certain number of fish that was granted in relation to a different fishery. 

  • A board or similar barrier that forms part of the side of something. 

verb
  • To add sideboards to. 

  • To include (a card) in one's sideboard. 

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