jack mackerel vs maasbanker

jack mackerel

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

maasbanker

noun
  • A species of edible mackerel (Trachurus trachurus). 

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