pasha vs rex

pasha

noun
  • The Indian butterfly Herona marathus, family Nymphalidae. 

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

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 pasha and rex occurred in a corpus of books? (source: Google Ngram Viewer )