jack mackerel vs saurel

jack mackerel

noun
  • Any of various edible fish, especially of genus Trachurus, but also genera Caranx, Acanthocybium and Euthynnus. 

saurel

noun
  • Any carangoid fish of the genus Trachurus, especially Trachurus trachurus, of Europe and America, and Trachurus picturatus of California; the skipjack, scad or horse mackerel. 

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