Aaron's rod vs torch

Aaron's rod

noun
  • A rod-shaped molding decorated with an entwined snake, and sometimes leaves, vines, and/or scrolls. 

  • Hylotelephium telephium (syn. Sedum telephium; orpine, livelong, or live-forever). 

  • Goldenrod, the Solidago genus of North American plants with yellow flowers. 

  • Verbascum thapsus, the great mullein, common mullein, or hag-taper. 

torch

noun
  • 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. 

  • An arsonist. 

  • 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"). 

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 Aaron's rod and torch occurred in a corpus of books? (source: Google Ngram Viewer )