Molotov cocktail vs bombshell

Molotov cocktail

noun
  • A crude incendiary bomb made from a glass bottle, either filled with a flammable liquid such as petroleum and supplied with a rag for a fuse that is lit just before being hurled, or filled with such a mix of flammable liquids that it ignites itself when it is smashed and its contents are exposed to air. 

bombshell

noun
  • A bomb or artillery shell designed to explode on impact. 

  • Something that is very surprising, shocking, amazing or sensational. 

  • Someone who is very attractive; a sex symbol. 

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