freehold vs proprietorship

freehold

noun
  • Real property held by a tenure of this type. 

  • Freehold tenure. 

verb
  • To dispense property in this way. 

adj
  • Of a tenure or estate in land, held in fee simple absolute in possession by a proprietor; granted out of the allodial title, liable to determine only on escheat. 

proprietorship

noun
  • The state of being a proprietor; ownership 

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