black hat vs thief

black hat

noun
  • A malicious hacker, one who violates computer security out of maliciousness or for personal gain. 

  • A villain or bad guy in a story, especially in a Western (a film or other work of the Western genre). 

  • A Haredi Jew; a member of an ultra-Orthodox Jewish community. 

thief

noun
  • One who steals another person's property, especially by stealth and without using force or violence. 

  • One who carries out a theft. 

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