avowal vs rejection

avowal

noun
  • An open declaration of affirmation or admission of knowledge. 

rejection

noun
  • The act of rejecting. 

  • The state of being rejected. 

  • An immune reaction of a host organism to a foreign biological tissue, such as in an organ transplant. 

  • A blocked shot. 

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