free speech vs self-determination

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-determination

noun
  • The ability or right to make one's own decisions without interference from others 

  • The political independence of a people 

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