grassroots vs national

grassroots

adj
  • Of, or relating to people or society at the local level, particularly in politics, social movements, etc.; of the grass roots. 

national

adj
  • Pertaining to a nation or country, especially as a whole; affecting, shared by, or existing throughout all of a nation. 

  • Belonging to or characteristic of a specific nation or country, as opposed to others. 

noun
  • A subject of a nation. 

  • A tournament in which participants from all over the nation compete. 

  • A national newspaper. 

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