preconception vs xenophobia

preconception

noun
  • A prejudice that prevents rational consideration of an issue. 

  • An opinion formed before obtaining adequate evidence, especially as the result of bias or prejudice. 

adj
  • Preconceptional. 

xenophobia

noun
  • A strong antipathy or aversion to strangers or foreigners. 

  • A fear of aliens. 

  • A fear of strangers or foreigners. 

  • A hatred of strangers or foreigners. 

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