Mephistopheles vs archangel

Mephistopheles

noun
  • A fiendish person, especially one who tricks someone into following a destructive or disastrous course of action; a tempter. 

name
  • The Devil to whom Faust sold his soul in the legend. 

archangel

noun
  • Synonym of angelica (“the garden herb”) 

  • A powerful angel that leads many other angels, but is still loyal to a deity, and often seen as belonging to a particular archangelical rank or order within a greater hierarchy of angels. (Judeo-Christian examples: Gabriel, Michael, Raphael, Uriel). 

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