gruel vs magic mushroom

gruel

noun
  • something that lacks substance 

  • A thin, watery porridge, formerly eaten primarily by the poor and the ill. 

  • punishment 

  • semen 

verb
  • ejaculate 

  • To exhaust, use up, disable 

  • to punish 

magic mushroom

noun
  • Any mushroom-like fungus that has psychedelic effects. 

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