Zip vs cocky

Zip

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

cocky

noun
  • A (familiar name for a) cockatoo. 

adj
  • Overly confident; arrogant and boastful. 

verb
  • To operate a small-scale farm. 

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