ethnic vs illegal alien

ethnic

noun
  • An ethnic person, especially a foreigner or member of an immigrant community. 

  • The demonym of an Ancient Greek city. 

adj
  • Of or relating to a group of people having common racial, ancestral, national, religious or cultural origins. 

  • Representative of a folk or traditional mode of expression. 

  • Characteristic of a foreign or a minority group's culture. 

  • Heathen, not Jewish, Christian, or Muslim. 

illegal alien

noun
  • A person who is within the boundaries of a political state without the authorization of the government of that state; a national of another country who has entered or stayed without permission. 

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