mellifluent vs soothing

mellifluent

adj

  • Mellifluous. 

soothing

adj

  • Tending to soothe. 

  • Giving relief. 

  • Freeing from fear or anxiety. 

noun

  • The act by which somebody is soothed. 

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