langer vs lapwing

langer

noun
  • Fool; idiot; annoying or contemptible person (usually male). 

  • A person from south county Dublin. 

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