feline vs tortoiseshell

feline

noun
  • A cat; member of the cat family Felidae. 

  • Any member of Felinae, one of the two extant subdivisions of Felidae. 

adj
  • Of or pertaining to cats. 

  • catlike (resembling a cat); sleek, graceful, inscrutable, sensual, and/or cunning. 

tortoiseshell

noun
  • A domestic cat (or a rabbit, guinea-pig, etc.) whose fur has black, brown and yellow markings. 

  • The hawksbill turtle. 

  • The horny, translucent, mottled covering of the carapace of the hawksbill turtle, used as a veneer etc. 

  • Any of several butterflies, mostly of the genera Nymphalis and Aglais that have similar markings. 

adj
  • Having markings resembling covering of carapace of hawksbill turtle. 

  • Made of the covering of carapace of hawksbill turtle. 

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