ding-a-ling vs lapwing

ding-a-ling

noun
  • An eccentric or crazy person. 

  • The penis. 

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

adj
  • Attractive. 

lapwing

noun
  • A silly man. 

  • The northern lapwing (Vanellus vanellus). 

  • Any of several medium-sized wading birds belonging to the subfamily Vanellinae, within family Charadriidae. 

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