St John's wort vs balsam

St John's wort

noun
  • The plant prepared as a medication. 

  • Any of several plants, of the genus Hypericum, especially Hypericum perforatum, that have yellow flowers and traditionally ward off evil. 

balsam

noun
  • Something soothing. 

  • A plant or tree yielding such substance. 

  • A soothing ointment. 

  • Canada balsam, a turpentine obtained from the resin of balsam fir. 

  • A sweet-smelling oil or resin derived from various plants. 

  • The balsam family of flowering plants (Balsaminaceae), which includes Impatiens and Hydrocera. 

  • A flowering plant of the genus Impatiens. 

  • A balsam fir Abies balsamea. 

verb
  • To treat or anoint with balsam. 

How often have the words St John's wort and balsam occurred in a corpus of books? (source: Google Ngram Viewer )