sand vs spine

sand

noun
  • Rock that is ground more finely than gravel, but is not as fine as silt (more formally, see grain sizes chart), forming beaches and deserts and also used in construction. 

  • A beach or other expanse of sand. 

  • A moment or interval of time; the term or extent of one's life (referring to the sand in an hourglass). 

  • "sand in [someone's] eyes" (idiom) 

  • A sandpiper. 

  • A particle from 62.5 microns to 2 mm in diameter, following the Wentworth scale. 

  • A light beige colour, like that of typical sand. 

adj
  • Of a light beige colour, like that of typical sand. 

verb
  • To abrade the surface of (something) with sand or sandpaper in order to smooth or clean it. 

  • To blot ink using sand. 

  • To cover with sand. 

spine

noun
  • Something resembling a backbone, such as a ridge, or a long, central structure from which other structures radiate. 

  • The stiffness of an arrow. 

  • Courage or assertiveness. 

  • The narrow, bound edge of a book that encloses the inner edges of the pages, facing outwards when the book is on a shelf and typically bearing the title and the author's and publisher's name. 

  • The heartwood of trees. 

  • A pointed, fairly rigid protuberance or needlelike structure on an animal, shell, or plant. 

  • A series of bones situated at the back from the head to the pelvis of a human, or from the head to the tail of an animal, enclosing the spinal cord and providing support for the thorax and abdomen. 

  • A linear payscale operated by some large organizations that allows flexibility for local and specific conditions. 

  • A tall mass of viscous lava extruded from a volcano. 

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