explosive vs physics package

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. 

physics package

noun
  • The part of any equipment which requires advanced knowledge of physics to design; especially the core nuclear components of a nuclear weapon 

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