houseboy vs tweeny

houseboy

noun
  • A non-white adult male domestic servant. 

  • A young male domestic servant, especially in a British colony in former times. 

tweeny

noun
  • A between-maid, or maidservant who helps the cook as well as the housemaid. 

  • A shot played between the legs; a tweener. 

adj
  • Characteristic of a typical tween (a child not quite old enough to be a teenager). 

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