Donna vs Princess

Donna

name

  • A female given name from Italian. 

  • A surname from Italian. 

  • A city in Hidalgo County, Texas, United States, named after postmistress Donna Fletcher. 

Princess

name

  • A female given name from English. 

  • The title of a princess. 

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