free speech vs leisure

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. 

leisure

noun
  • Freedom provided by the cessation of activities. 

  • Free time, time free from work or duties. 

  • Time at one's command, free from engagement; convenient opportunity; hence, convenience; ease. 

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