flatty vs jack mackerel

flatty

noun

  • A flathead (fish). 

  • A hot rod fitted with a flathead V8 engine. 

  • A flat tire/tyre. 

  • A flatfish. 

  • A flathead V8 engine. 

jack mackerel

noun

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

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