speckled trout vs squaretail

speckled trout

noun
  • A North American freshwater game fish (Salvelinus fontinalis); the brook trout. 

squaretail

noun
  • The brook trout, a fish of the species Salvelinus fontinalis, found in North America. 

  • A perciform fish of the genus Tetragonurus, found in tropical and subtropical oceans. 

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