allay vs put to rest

allay

verb
  • To make quiet or put at rest; to pacify or appease; to quell; to calm. 

  • To alleviate; to abate; to mitigate. 

noun
  • Alleviation; abatement; check. 

put to rest

verb
  • To settle or finish, especially a question or discussion. 

How often have the words allay and put to rest occurred in a corpus of books? (source: Google Ngram Viewer )