ding-a-ling vs prettiful

ding-a-ling

adj
  • Attractive. 

noun
  • The penis. 

  • An eccentric or crazy person. 

  • The sound of a small bell; the sound of a fire engine bell. 

prettiful

adj
  • pretty, beautiful, cute 

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