lapwing vs laughing gull

lapwing

noun
  • The northern lapwing (Vanellus vanellus). 

  • Any of several medium-sized wading birds belonging to the subfamily Vanellinae, within family Charadriidae. 

  • A silly man. 

laughing gull

noun
  • A common European gull (Xema ridibundus). 

  • An American gull (Leucophaeus atricilla); in summer the head is nearly black, the back slate color, and the five outer primaries black. 

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