kitten vs sabre-toothed tiger

kitten

noun
  • A young rabbit, rat, hedgehog, squirrel, fox, beaver, badger, etc. 

  • A moth of the genus Furcula. 

  • A term of endearment, especially for a woman. 

  • A young cat, especially before sexual maturity (reached at about seven months). 

verb
  • To give birth to kittens. 

sabre-toothed tiger

noun
  • Any of numerous species of extinct cat-like mammals, of the Machairodontinae subfamily of the Felidae. 

How often have the words kitten and sabre-toothed tiger occurred in a corpus of books? (source: Google Ngram Viewer )