banal vs grassroots

banal

adj
  • Relating to a type of feudal jurisdiction or service. 

  • Common in a boring way, to the point of being predictable; containing nothing new or fresh. 

grassroots

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

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