minion vs slavey

minion

noun
  • A loyal servant of another, usually a more powerful being. 

  • A sycophantic follower. 

  • The size of type between nonpareil and brevier, standardized as 7-point. 

slavey

noun
  • A male servant. 

  • A female domestic servant; a maid or maidservant. 

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