ethnocentrism vs xenophobia

ethnocentrism

noun
  • The tendency to look at the world primarily from the perspective of one's own traditional, deferred, or adoptive ethnic culture. 

xenophobia

noun
  • A hatred of strangers or foreigners. 

  • A fear of aliens. 

  • A strong antipathy or aversion to strangers or foreigners. 

  • A fear of strangers or foreigners. 

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