saurel vs scad

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. 

scad

noun
  • Any of several fish, of the family Carangidae, from the western Atlantic. 

  • A large number or quantity. 

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