magnate vs rex

magnate

noun
  • In medieval and early modern Italy, a member of a legally defined category of especially wealthy patrician families, often deprived of the right to political participation by republican governments. 

  • Powerful industrialist; captain of industry. 

  • A person of rank, influence or distinction in any sphere. 

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