balm vs hush

balm

verb
  • To soothe; to mitigate. 

noun
  • Any of various aromatic resins exuded from certain plants, especially trees of the genus Commiphora of Africa, Arabia and India and Myroxylon of South America. 

  • The lemon balm, Melissa officinalis 

  • A plant or tree yielding such substance. 

  • Any soothing oil or lotion, especially an aromatic one. 

  • Something soothing. 

  • Any of a number of other aromatic herbs with a similar citrus-like scent, such as bee balm and horse balm. 

hush

verb
  • To appease; to allay; to soothe. 

  • To make quiet. 

  • To become quiet. 

  • To clear off soil and other materials overlying the bedrock. 

noun
  • A mining method using water 

  • A silence, especially after some noise 

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