oligarch vs princess

oligarch

noun
  • A member of an oligarchy; someone who is part of a small group that runs a country. 

  • A very wealthy business owner who wields political power. 

  • A protoplanet formed during oligarchic accretion. 

princess

noun
  • A young girl or woman (or less commonly a man) who is vain, spoiled or selfish; a prima donna. 

  • A tinted crystal marble used in children's games. 

  • The wife of a prince; the female ruler of a principality. 

  • A female member of a royal family other than a queen, especially a daughter or granddaughter of a monarch. 

  • A type of court card in the Tarot pack, coming between the 10 and the prince (Jack). 

  • A woman or girl who excels in a given field or class. 

  • A female lemur. 

  • A Bulgarian open-faced baked sandwich prepared with ground meat. 

  • A young girl; used as a term of endearment. 

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