lander vs wetback

lander

noun
  • An illegal immigrant. 

  • One who lands, or who lands something. 

  • A spacecraft, particularly a probe, designed to set down on the surface of another celestial body. 

  • A person who waits at the mouth of the shaft to receive the kibble of ore. 

  • A person from a specific land. See highlander, Greenlander. 

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 lander and wetback occurred in a corpus of books? (source: Google Ngram Viewer )