disrupter vs firebomb

disrupter

noun
  • An energy weapon in the form of a pistol. 

  • Someone or something that disrupts. 

firebomb

noun
  • A weapon that causes fire; an incendiary weapon. 

verb
  • To attack with a firebomb. 

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