greenshank vs sandpiper

greenshank

noun
  • A wading bird, Tringa nebularia, that has long greenish legs and is native to Eurasia. 

sandpiper

noun
  • Any of various small wading birds of the family Scolopacidae. 

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