dingus vs lapwing

dingus

noun
  • A fool or incompetent person. 

  • A gadget, device, or object whose name is either unknown, forgotten, or omitted for the purpose of humor. 

  • penis 

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 dingus and lapwing occurred in a corpus of books? (source: Google Ngram Viewer )