gaslight vs lamppost

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. 

lamppost

noun
  • The pole that holds up a light so it can illuminate a wide area, such as holds up a streetlight. 

  • A tall, thin person. 

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