bookshelf vs furniture

bookshelf

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

furniture

noun
  • Impressive-looking books used for filling out the collection of a private library. 

  • Fittings, such as handles, of a door, coffin, or other wooden item. 

  • The harness, trappings etc. of a horse, hawk, or other animal. 

  • The stock and forearm of a weapon. 

  • Any material on the page other than the text and pictures of stories. 

  • A type of mixture organ stop. 

  • Large movable item(s), usually in a room, which enhance(s) the room's characteristics, functionally or decoratively. 

  • The pieces of wood or metal put round pages of type to make proper margins and fill the spaces between the pages and the chase. 

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