kitten vs lastborn

kitten

noun
  • A young cat, especially before sexual maturity (reached at about seven months). 

  • A moth of the genus Furcula. 

  • A young rabbit, rat, hedgehog, squirrel, fox, beaver, badger, etc. 

  • A term of endearment, especially for a woman. 

verb
  • To give birth to kittens. 

lastborn

noun
  • The youngest child of a family. 

  • The youngest member of any company or organization. 

adj
  • Born last in a family; youngest in a the family. 

  • Younger than anyone else in a group. 

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