repudiation vs sundering

repudiation

noun
  • The act of refusing to accept; the act of repudiating. 

  • The young man's repudiation of the church's doctrines caused a conflict with his religious parents. 

sundering

noun
  • The act by which something is sundered. 

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