proprietorship vs regime

proprietorship

noun
  • The state of being a proprietor; ownership 

regime

noun
  • Mode of rule or management. 

  • A division of a Mafia crime family, led by a caporegime. 

  • A set of characteristics. 

  • A period of rule. 

  • A form of government, or the government in power. 

  • A regulated system; a regimen. 

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