doorknob vs lapwing

doorknob

noun
  • A stupid person. 

  • A circular device attached to a door, the rotation of which permits the unlatching of the door. 

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