blowtorch vs gaslight

blowtorch

noun
  • A tool which projects a controlled stream of a highly flammable gas over a spark in order to produce a controlled flame. 

  • A jet fighter. 

verb
  • To apply a blowtorch to something. 

gaslight

noun
  • A lamp which operates by burning piped illuminating gas (or town gas). 

  • The light produced by the burning gas in such a lamp. 

verb
  • To manipulate someone such that they doubt their own memory, perceptions of reality, or sanity, typically for malevolent reasons. 

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