lapwing vs plonker

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. 

plonker

noun
  • A fool. 

  • A penis. 

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