mountain spinach vs orach

mountain spinach

noun
  • A plant in the amaranth family used as a leaf vegetable, Atriplex hortensis. 

orach

noun
  • or Atriplex patula, found in dry habitats, that have edible leaves resembling spinach. 

  • especially Atriplex hortensis 

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