lake trout vs togue

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. 

togue

noun
  • Lake trout, Salvelinus namaycush, a freshwater char of northern North America. 

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