explosive vs incendiary device

explosive

adj
  • Easily driven to anger, usually with reference to a person. 

  • Shocking; startling. 

  • With the capability to, or likely to, explode. 

  • Having the character of an explosion. 

noun
  • Any explosive substance. 

incendiary device

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