rib vs sacrum

rib

noun
  • Any of a series of long curved bones occurring in 12 pairs in humans and other animals and extending from the spine to or toward the sternum. 

  • A cut of meat enclosing one or more rib bones. 

  • A long, narrow, usually arched member projecting from the surface of a structure, especially such a member separating the webs of a vault 

  • A teasing joke. 

  • A stalk of celery. 

  • A single strand of hair. 

  • Any of several transverse pieces that provide an aircraft wing with shape and strength. 

  • The main, or any of the prominent veins of a leaf. 

  • Watercress (Nasturtium officinale). 

  • A part or piece, similar to a rib, and serving to shape or support something. 

  • A raised ridge in knitted material or in cloth. 

  • Any of several curved members attached to a ship's keel and extending upward and outward to form the framework of the hull. 

  • Hound's-tongue (Cynoglossum officinale). 

  • Costmary (Tanacetum balsamita). 

verb
  • To enclose, as if with ribs, and protect; to shut in. 

  • To leave strips of undisturbed ground between the furrows in ploughing (land). 

  • To tease or make fun of someone in a good-natured way. 

  • To shape, support, or provide something with a rib or ribs. 

sacrum

noun
  • A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood. 

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