declaration vs demonstration

declaration

noun
  • The act or process of declaring. 

  • In common law, the formal document specifying plaintiff's cause of action, including the facts necessary to sustain a proper cause of action, and to advise the defendant of the grounds upon which he is being sued. 

  • The specification of an object, such as a variable or function, establishing its existence but not necessarily describing its contents. 

  • The act, by the captain of a batting side, of declaring an innings closed. 

  • A written or oral indication of a fact, opinion, intention, belief, etc. 

  • A list of items for various legal purposes, e.g. customs declaration. 

demonstration

noun
  • The act of demonstrating; showing or explaining something. 

  • A public display of group opinion, such as a protest march. 

  • A proof. 

  • Expression of one's feelings by outward signs. 

  • A prisoner's act of beating up another prisoner. 

  • An event at which something will be demonstrated. 

  • A show of military force. 

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