dethrone vs lower in rank

dethrone

verb
  • To depose; to forcibly relieve a monarch of the monarchy. 

  • To remove (something) from a position of power or paramount importance. 

  • To remove any governing authority from power. 

  • To remove from any position of high status or power. 

lower in rank

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