lake trout vs siscowet

lake trout

noun
  • A large species of trout found in lakes in North America, Salvelinus namaycush. 

  • Whiting fried in batter and served in a sandwich. 

siscowet

noun
  • A freshwater fish from Lake Superior in the Great Lakes, a variety of the lake trout. 

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