great mullein vs torch

great mullein

noun
  • A common herb of Europe and neighboring Africa and Asia, but widely naturalized elsewhere, Verbascum thapsus, having a flannel-like texture from course plant hairs and a tall, straight flower stalk. 

torch

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"). 

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

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

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