placation vs soothing

placation

noun
  • A process or act of placating; appeasement or an expression of appeasement. 

soothing

noun
  • The act by which somebody is soothed. 

adj
  • Giving relief. 

  • Freeing from fear or anxiety. 

  • Tending to soothe. 

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