Cat vs Princess

Cat

name

  • A diminutive of the female given names Catherine or Caitlin. 

noun

  • A Catalina flying boat. 

  • A piece of heavy machinery, such as a backhoe, of the Caterpillar brand. 

Princess

name

  • A female given name from English. 

  • The title of a princess. 

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