allay vs banish

allay

verb
  • To alleviate; to abate; to mitigate. 

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

noun
  • Alleviation; abatement; check. 

banish

verb
  • To expel, especially from the mind. 

  • To send someone away and forbid that person from returning. 

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