catgut vs fiber

catgut

noun
  • The material from which such cords are made. 

  • A sort of linen or canvas, with wide interstices. 

  • A cord of great toughness made from the intestines of animals, especially of sheep, used for strings of musical instruments, racquets, sutures etc. 

  • Tephrosia virginiana (goat's rue, devil's shoestring). 

fiber

noun
  • A material in the form of fibers. 

  • A material whose length is at least 1000 times its width. 

  • A long tubular cell found in bodily tissue. 

  • The pullback of a morphism along a global element (called the fiber of the morphism over the global element). 

  • A kind of lightweight thread of execution. 

  • Moral strength and resolve. 

  • Dietary fiber. 

  • The preimage of a given point in the range of a map. 

  • A single elongated piece of a given material, roughly round in cross-section, often twisted with other fibers to form thread. 

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