domestic cat vs leopard

domestic cat

noun
  • A domesticated cat, of the species Felis catus or Felis silvestris catus, especially one kept as a pet or for vermin control. 

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 domestic cat and leopard occurred in a corpus of books? (source: Google Ngram Viewer )