countess vs rex

countess

noun
  • The wife of a count or earl. 

  • A woman holding the rank of count or earl in her own right; a female holder of an earldom. 

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