baroness vs shah

baroness

noun
  • A woman holding a baronial title in her own right; a female ruler of a barony. 

  • The wife of a baron. 

shah

noun
  • A supreme ruler in some Middle Eastern or South Asian nations. 

  • A king of Persia or Iran. 

  • A Ukrainian monetary unit. 

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