northern lapwing vs white-crowned plover

northern lapwing

noun
  • A crested plover, Vanellus vanellus. 

white-crowned plover

noun
  • a bird, a medium-sized wader, which despite its name is a lapwing rather than a typical plover. 

How often have the words northern lapwing and white-crowned plover occurred in a corpus of books? (source: Google Ngram Viewer )