snail vs tod

snail

noun
  • A slow person; a sluggard. 

  • A spiral cam, or a flat piece of metal of spirally curved outline, used for giving motion to, or changing the position of, another part, as the hammer tail of a striking clock. 

  • A tortoise or testudo; a movable roof or shed to protect besiegers. 

  • Any of very many animals (either hermaphroditic or nonhermaphroditic), of the class Gastropoda, having a coiled shell. 

  • A locomotive with a prime mover but no traction motors, used to provide extra electrical power to another locomotive. 

  • The pod of the snail clover. 

verb
  • To move or travel very slowly. 

tod

noun
  • Someone like a fox; a crafty person. 

  • A bush, especially of ivy. 

  • A male fox. 

  • A fox in general. 

  • An old English measure of weight, usually of wool, containing two stone or 28 pounds (13 kg). 

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