jack mackerel vs jackfruit

jack mackerel

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

jackfruit

noun
  • A tree, Artocarpus heterophyllus, of the Moraceae family, which produces edible fruit. 

  • The large fruit from this tree. 

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