candlewood vs great mullein

candlewood

noun
  • Pterocelastrus tricuspidatus, a medium-sized evergreen tree indigenous to South Africa. 

  • Dacryodes excelsa, a tree native to Puerto Rico. 

great mullein

noun
  • A common herb of Europe and neighboring Africa and Asia, but widely naturalized elsewhere, Verbascum thapsus, having a flannel-like texture from course plant hairs and a tall, straight flower stalk. 

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