citizenship vs communism

citizenship

noun
  • The status of being a citizen, in its various senses. 

  • The state of being a citizen, in its various senses. 

communism

noun
  • Any political social system that implements a communist political philosophy. 

  • The international socialist society where classes, money, and the state no longer exist. 

  • Any far-left political ideology or philosophy advocating holding the production of resources collectively, especially by seizing it through revolution. 

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