goosefoot vs saltbush

goosefoot

noun
  • Any of many flowering plants, of the subfamily Chenopodioideae, having small greenish flowers. 

saltbush

noun
  • 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. 

  • Sarcobatus vermiculatus (black greasewood, greasewood, seepwood) 

  • Baccharis halimifolia 

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