housecat vs sabre-toothed tiger

housecat

noun
  • A pet cat that is not allowed outside 

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 housecat and sabre-toothed tiger occurred in a corpus of books? (source: Google Ngram Viewer )