contraband vs wetback

contraband

noun
  • A black slave during the American Civil War who had escaped to, or been captured by, Union forces. 

  • Goods which are prohibited from being traded, smuggled goods. 

  • Any goods which are illicit or illegal to possess. 

adj
  • Prohibited from being traded. 

wetback

noun
  • A Mexican or Central American who illegally enters the United States of America from its southern border. 

  • A person of the mestizo race; a mojado. 

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