Thing vs polity

Thing

noun
  • Nickname or appellative for numerous "things", including fictional characters. 

  • A public assembly or judicial council in a Germanic country. 

  • Nickname for the Volkswagen 181. 

polity

noun
  • An organizational structure of the government of a state, church, etc. 

  • A politically organized unit; a state. 

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