fat hen vs lamb's quarters

fat hen

noun
  • Chenopodium album, the white goosefoot. 

  • Other related species, such as Good King Henry (Blitum bonus-henricus) 

lamb's quarters

noun
  • Chenopodium album, of the goosefoot family, sometimes used as a potherb 

  • Any of several similar plants of genera Chenopodium and Atriplex. 

How often have the words fat hen and lamb's quarters occurred in a corpus of books? (source: Google Ngram Viewer )