declaration vs testimony

declaration

noun
  • 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. 

  • The act or process of declaring. 

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

testimony

noun
  • Statements made by a witness in court. 

  • In a church service (or religious service), a personal account, such as one's conversion, testimony of faith, or life testimony. 

  • An account of first-hand experience. 

  • Witness; evidence; proof of some fact. 

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