errand vs power of attorney

errand

noun
  • A mundane mission of no great consequence, concerning household or business affairs (dropping items by, doing paperwork, going to a friend's house, etc.) 

  • An oral message trusted to a person for delivery. 

  • The purpose of such a journey. 

verb
  • To send someone on an errand. 

  • To go on an errand. 

power of attorney

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

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

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