Mary Joanna vs sweetleaf

Mary Joanna

noun
  • Marijuana; cannabis. 

sweetleaf

noun
  • Cannabis. 

  • Symplocos tinctoria, an evergreen shrub or small tree in the southeastern United States. 

  • Monarda fistulosa, wild bergamot, a medicinal and ornamental herb. 

  • Sauropus androgynus, a plant of the family Phyllanthaceae whose leaves may be used as a potherb. 

  • Any plant of the genus Stevia, from which stevia is extracted. 

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