Zip vs barbarian

Zip

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

barbarian

noun
  • A cruel, savage, brutal person; one without pity or humanity. 

  • A foreigner, especially with barbaric qualities as in the above definitions. 

  • A person destitute of culture; a Philistine. 

  • Someone from a developing country or backward culture. 

  • A non-Greek or a non-Roman. 

  • A warrior, clad in fur or leather, associated with sword and sorcery stories. 

  • An uncivilized or uncultured person, originally compared to the hellenistic Greco-Roman civilisation; often associated with fighting or other such shows of strength. 

adj
  • Relating to people, countries, or customs perceived as uncivilized or inferior. 

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