Jack-in-the-pulpit vs jack mackerel

Jack-in-the-pulpit

noun
  • Any plant in the genus Arisaema. 

  • Cat's cradle. 

  • A woodland plant of northern Europe, Arum maculatum. 

  • A plant in the northeastern North America, Arisaema triphyllum. 

jack mackerel

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

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