corroboration vs prohibition

corroboration

noun
  • That which corroborates. 

  • The act of corroborating, strengthening, or confirming; addition of strength; confirmation 

prohibition

noun
  • A law prohibiting the manufacture or sale of alcohol. 

  • A period of time when specific socially disapproved consumables are considered controlled substances. 

  • An act of prohibiting, forbidding, disallowing, or proscribing something. 

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