saltbush vs sorrel

saltbush

noun
  • Baccharis halimifolia 

  • Sarcobatus vermiculatus (black greasewood, greasewood, seepwood) 

  • Any of the genus Atriplex of plants, especially Atriplex hortensis or Atriplex patula, found in dry habitats, that have edible leaves resembling spinach, including many desert and seashore plants and halophytes. 

sorrel

noun
  • The roselle, Hibiscus sabdariffa. 

  • Rumex acetosa (common sorrel, garden sorrel), sometimes used as a salad vegetable. 

  • A brown colour, with a tint of red. 

  • Members of genus Oxalis or family Oxalidaceae, woodsorrels. 

  • A drink, consumed especially in the Caribbean around Christmas, made from the flowers of Hibiscus sabdariffa: hibiscus tea. 

adj
  • Of a brown colour, with a tint of red. (especially: a sorrel horse) 

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