forbid vs proscribe

forbid

verb
  • To disallow; to proscribe. 

  • To oppose, hinder, or prevent, as if by an effectual command. 

  • To deny, exclude from, or warn off, by express command. 

proscribe

verb
  • To banish or exclude. 

  • To forbid or prohibit. 

  • To denounce. 

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