European pollock vs pollock

European pollock

noun
  • Fish of the species Pollachius pollachius, which live in the Northern Hemisphere, particularly off the coast of Norway and the United Kingdom. 

pollock

noun
  • Either of two lean, white marine food fishes, of the genus Pollachius, in the cod family. 

verb
  • To fish for pollock. 

  • To splatter, as with paint. 

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