belligerent vs saber-rattler

belligerent

adj
  • Eager to go to war, warlike. 

  • Engaged in warfare, warring. 

  • Of or pertaining to war. 

  • Uncooperative. 

  • Aggressively hostile, eager to fight. 

  • Acting violently towards others. 

noun
  • A state or other armed participant in warfare 

saber-rattler

How often have the words belligerent and saber-rattler occurred in a corpus of books? (source: Google Ngram Viewer )