neutron bomb vs nuclear power

neutron bomb

noun
  • An atomic bomb that produces a greater amount of neutrons, and a lesser amount of blast; the intention being to create equal lethal neutron radiation and blast radii which increases the effectiveness of the weapon against armour while reducing collateral damage. 

nuclear power

noun
  • A nation that possesses nuclear weapons. 

  • Power, especially electrical power, obtained using nuclear fission or nuclear fusion. 

How often have the words neutron bomb and nuclear power occurred in a corpus of books? (source: Google Ngram Viewer )