fly agaric vs flyswatter

fly agaric

noun
  • A poisonous and hallucinogenic mushroom, Amanita muscaria, with a large crimson cap, fading to yellow, scattered with white flecks. 

flyswatter

noun
  • A hand-held device for swatting flies or other insects, to kill or shoo them. 

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