top light vs torch

top light

noun
  • Light from above; toplighting. 

  • Any glazing above a main window, partition or door 

  • A skylight. 

  • The upper (and usually smaller) part (casement) of a window, often hinged a the top 

torch

noun
  • A portable light source powered by electricity; a flashlight. 

  • An arsonist. 

  • A stick with a flame on one end, used chiefly as a light source; a similarly shaped implement with a replaceable supply of flammable material. 

  • A blowtorch or oxy-gas torch. 

  • A torch drive ("a spacecraft engine which produces thrust by nuclear fusion"). 

verb
  • To set fire to, especially by use of a torch (flaming stick). 

  • To travel in a spacecraft propelled by a torch drive ("a spacecraft engine which produces thrust by nuclear fusion"). 

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