captor vs conservator

captor

noun
  • One who catches or has caught or captured something or someone. 

  • One who is holding a captive or captives. 

conservator

noun
  • One who conserves, preserves or protects something. 

  • A person appointed by a court to manage the affairs of another; similar to a guardian but with some powers of a trustee. 

  • A professional who works on the conservation and restoration of objects, particularly artistic objects. 

  • An officer in charge of preserving the public peace, such as a justice or sheriff. 

  • A judge delegated by the pope to defend certain privileged classes of persons from manifest or notorious injury or violence, without recourse to a judicial process. 

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