burro vs jenny

burro

noun
  • A small donkey, especially when used as a pack animal or one that is feral and lives in the southwestern United States or northern Mexico. 

jenny

noun
  • A female creature of certain kinds, such as wren and donkey. 

  • A device for spinning thread from fiber onto multiple spindles (also called spinning jenny). 

  • A catmill. 

  • In billiards and similar games, a powerful follow shot with plenty of topspin. 

verb
  • To wind finished lace onto cards ready for sale. 

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