belligerently vs frighteningly

belligerently

adv
  • In a belligerent manner; with aggressive hostility. 

frighteningly

adv
  • In a frightening or terrifying manner. 

  • Very; beyond usual expectation so as to cause surprise or concern. 

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