self-congratulation vs sweetness

self-congratulation

noun
  • self-satisfied congratulation of oneself for one's achievements or situation 

sweetness

noun
  • A pleasant disposition; kindness. 

  • Term of address for one's sweetheart. 

  • The condition of being sweet or sugary. 

  • The quality of giving pleasure to the mind or senses, pleasantness, agreeableness. 

How often have the words self-congratulation and sweetness occurred in a corpus of books? (source: Google Ngram Viewer )