buttercup vs suckling

buttercup

noun
  • Affectionate or ironic term of address. 

  • Any of many herbs, of the genus Ranunculus, having yellow flowers; the crowfoot. 

  • Any flower of the genus Narcissus; a daffodil. 

suckling

noun
  • The act of suckling. 

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

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

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