free speech vs self-government

free speech

noun
  • The right to express an opinion in public without being restrained or censored. 

  • Expressions that are or should be allowed in some moral or legal context. 

self-government

noun
  • The governance of a region by its own populace; autonomy. 

How often have the words free speech and self-government occurred in a corpus of books? (source: Google Ngram Viewer )