duchess vs rex

duchess

verb
  • to court or curry favour for political or business advantage; to flatter obsequiously. 

noun
  • The wife or widow of a duke. 

  • The female ruler of a duchy. 

rex

noun
  • An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking. 

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