avocet vs swordfish

avocet

noun
  • Any of four species of wading birds in the genus Recurvirostra, of the family Recurvirostridae, with long, slender recurved bills, long legs, and webbed feet. 

swordfish

noun
  • A large marine fish with a long, pointed bill, Xiphias gladius. 

  • A sudoku technique involving possible cell locations for a digit, or pair, or triple, in uniquely three rows and three columns only. This allows for the elimination of candidates around the grid. 

verb
  • To fish for swordfish. 

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