beefsteak mushroom vs lorchel

beefsteak mushroom

noun
  • Fistulina hepatica (an edible fungus) 

  • Gyromitra esculenta (a potentially fatally poisonous fungus that is a delicacy) 

lorchel

noun
  • a mushroom of the family Helvellaceae. 

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