suckling vs yeanling

suckling

noun
  • A young mammal not yet weaned and still being fed milk by its mother. 

  • An infant that is still being breastfed (being suckled) by its mother. 

  • The act of suckling. 

yeanling

noun
  • The newly born offspring of a goat or sheep. 

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