duchess vs pasha

duchess

noun
  • The female ruler of a duchy. 

  • The wife or widow of a duke. 

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

pasha

noun
  • A high-ranking Turkish military officer, especially as a commander or regional governor; the highest honorary title during the Ottoman Empire. 

  • The Indian butterfly Herona marathus, family Nymphalidae. 

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