demote vs dethrone

demote

verb
  • To lower the rank or status of. 

  • To relegate. 

dethrone

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

  • 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. 

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