Zip vs horse mackerel

Zip

noun
  • A Sicilian or Italian Mafioso who is relatively new to the United States. 

horse mackerel

noun
  • Megalaspis cordyla (torpedo scad) 

  • Atule (certain scads) 

  • Alectis indica (Indian threadfish) 

  • Carangoides spp. (island jacks) 

  • Sarda australis (Australian bonito) 

  • Trachurus spp. (jack mackerels). 

  • Gnathanodon speciosus (golden trevally) 

  • Naucrates ductor (pilot fish) 

  • Sarda sarda (Atlantic bonito) 

  • Caranx spp. (certain trevallies) 

  • Selar crumenophthalmus (bigeye scad) 

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