dickhead vs lapwing

dickhead

noun
  • A stupid or useless person. 

  • A jerk; a mean or rude person. 

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