kindle vs wolf cub

kindle

noun
  • A group of kittens. 

adj
  • pregnant 

verb
  • To arouse or inspire (a passion, etc). 

  • To begin to grow or take hold. 

  • To start (a fire) or light (a torch, a match, coals, etc.). 

  • To bring forth young; to give birth. 

wolf cub

noun
  • A young wolf. 

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