explosive vs trip switch

explosive

noun
  • Any explosive substance. 

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. 

trip switch

noun
  • A device that deactivates an electrical circuit under certain conditions, often for safety reasons 

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