early vs spine

early

noun
  • A shift (scheduled work period) that takes place early in the day. 

adv
  • At a time before expected; sooner than usual. 

  • Soon; in good time; seasonably. 

adj
  • Near the start or beginning. 

  • Near the start of the day. 

  • Having begun to occur; in its early stages. 

  • At a time in advance of the usual or expected event. 

  • Arriving a time before expected; sooner than on time. 

  • Of a star or class of stars, hotter than the sun. 

spine

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

  • 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. 

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

  • 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 tall mass of viscous lava extruded from a volcano. 

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