defender vs guardian angel

defender

noun
  • A fighter who seeks to repel an attack. 

  • A defendant in a civil action. 

  • Someone who defends people or property. 

  • A lawyer who represents defendants, especially a public defender; a defense attorney (US) or defence counsel (UK). 

  • One of the players whose primary task is to prevent the opposition from scoring. 

guardian angel

noun
  • A person who watches over another. 

  • A tutelary angel watching over a particular person in monotheistic contexts. 

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