feline vs leopard

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. 

leopard

noun
  • A similar-looking, large wild cat named after the leopard. 

  • The snow leopard (Panthera uncia), a large wild cat native to Asia. 

  • A lion passant guardant. 

  • Panthera pardus, a large wild cat with a spotted coat native to Africa and Asia, especially the male of the species (in contrast to leopardess). 

  • Any of various nymphalid butterflies of the genus Phalanta, having black markings on an orange base. 

  • The clouded leopard (Neofelis nebulosa), a large wild cat native to Asia. 

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