ducky vs prettiful

ducky

adj
  • Darling, charming, cute. 

  • Resembling or characteristic of a duck. 

noun
  • A duck (aquatic bird), especially a toy rubber duck. 

  • An affectionate pet name. 

prettiful

adj
  • pretty, beautiful, cute 

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