assuage vs put at ease

assuage

verb
  • To pacify or soothe (someone). 

  • To lessen the intensity of, to mitigate or relieve (hunger, emotion, pain etc.). 

put at ease

verb
  • To evoke or cause someone to be relaxed or calm. 

How often have the words assuage and put at ease occurred in a corpus of books? (source: Google Ngram Viewer )