landlord vs proprietress

landlord

noun
  • The owner or manager of a public house. 

  • A shark, imagined as the owner of the surf to be avoided. 

  • A person that leases real property; a lessor. 

proprietress

noun
  • A female proprietor. 

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