nationalism vs nationhood

nationalism

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

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

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

nationhood

noun
  • The fact of achieving national independence or autonomy. 

  • The quality of being a nation. 

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