deputation vs power of attorney

deputation

noun
  • The person or persons deputed or commissioned by another person, party, or public body to act in his or its behalf; a delegation. 

  • The act of deputing, or of appointing or commissioning a deputy or representative; office of a deputy or delegate; vicegerency. 

  • Among Christian missionaries, the process or period of time during which they raise support in preparation for going to their mission field. 

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 deputation and power of attorney occurred in a corpus of books? (source: Google Ngram Viewer )