dunnock vs heal-all

dunnock

noun
  • A small European and Asian passerine bird, Prunella modularis; the hedge sparrow or hedge warbler. 

heal-all

noun
  • A small, herbaceous European plant with blue-violet flowers; Prunella vulgaris. 

  • A remedy for all diseases. 

How often have the words dunnock and heal-all occurred in a corpus of books? (source: Google Ngram Viewer )