instruction vs power of attorney

instruction

noun
  • The act of instructing, teaching, or furnishing with information or knowledge. 

  • An instance of the information or knowledge so furnished. 

  • An order or command. 

  • A set of directions provided by a manufacturer for the users of a product or service. 

  • A single operation of a processor defined by an instruction set architecture. 

power of attorney

noun
  • The legal authorisation of one person to act as the agent of another. 

  • A legal document allowing one person to act as the agent of another. 

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