repeal vs validate

repeal

noun
  • An act or instance of repealing. 

verb
  • To recall; to summon (a person) again; to bring (a person) back from exile or banishment. 

  • To cancel, invalidate, annul. 

  • To suppress; to repel. 

validate

verb
  • To check or prove the validity of; verify. 

  • To have its validity successfully proven. 

  • To render valid. 

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