Hitlerism vs nationalism

Hitlerism

noun
  • The political philosophy and practices of Adolf Hitler and the Nazi party. 

nationalism

noun
  • Support for the union of Northern Ireland and the Republic of Ireland. 

  • Support for the creation of a sovereign nation (which does not currently exist). 

  • Patriotism; the idea of supporting one's country, people or culture. 

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