guardian vs trustee

guardian

noun
  • Someone who guards, watches over, or protects. 

  • A superior in a Franciscan monastery. 

  • A person legally responsible for a minor (in loco parentis). 

  • A person legally responsible for an incompetent person. 

  • A major or final enemy; boss. 

trustee

noun
  • A person in whose hands the effects of another are attached in a trustee process. 

  • A person to whom property is legally committed in trust, to be applied either for the benefit of specified individuals, or for public uses; one who is intrusted with property for the benefit of another. 

verb
  • To commit (property) to the care of a trustee. 

  • To attach (a debtor's wages, credits, or property in the hands of a third person) in the interest of the creditor. 

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