Zip vs foxtail

Zip

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

foxtail

noun
  • Lycopodiella alopecuroides, foxtail clubmoss. 

  • Bromus madritensis, foxtail brome. 

  • The tail of a fox. 

  • species of genus Alopecurus, foxtail grasses. 

  • Acalypha hispida, chenille plant. 

  • Hordeum jubatum, foxtail barley. 

  • Wodyetia bifurcata, foxtail palm. 

  • species of Setaria, foxtail millets. 

  • Any of various grasses having bushy seed spikelets that resemble the tail of a fox 

  • The last cinders obtained in the fining process. 

  • A dry spikelet or spikelet seed and flower cluster of some grasses 

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