people's vs proletarian

people's

adj
  • Considered to be of, from, or in tune with the common people, rather than from a ruling elite. 

  • In certain socialist states: of, from, or controlled (at least in name) by the common people rather than a ruling elite. 

  • Used other than figuratively or idiomatically: see people, -'s. 

proletarian

adj
  • Of or relating to the proletariat. 

noun
  • A member of the proletariat. 

How often have the words people's and proletarian occurred in a corpus of books? (source: Google Ngram Viewer )