invertebrate vs wanty

invertebrate

noun
  • An animal without vertebrae, i.e. backbone. 

  • A spineless person; a coward. 

adj
  • Cowardly, uncourageous; lacking character. 

  • Lacking a backbone; without vertebrae. 

wanty

noun
  • A surcingle, or strap of leather, used for binding a load upon the back of an animal. 

  • A stretch of fishing-lines shot in the water. 

  • A girth or belly-band for a horse's harness. 

  • A leather tie; a short wagon rope. 

adj
  • Possessing or indicating lack; deficient. 

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