affirmation vs profession

affirmation

noun
  • That which is affirmed; a declaration that something is true. 

  • A form of self-forced meditation or repetition; autosuggestion. 

  • The solemn declaration made by Quakers and others incapable of taking an oath. 

profession

noun
  • Any declaration of belief, faith or one's opinion, whether genuine or (as now often implied) pretended. 

  • The practitioners of such an occupation collectively. 

  • The declaration of belief in the principles of a religion; hence, one's faith or religion. 

  • A promise or vow made on entering a religious order. 

  • An occupation, trade, craft, or activity in which one has a professed expertise in a particular area; a job, especially one requiring a high level of skill or training. 

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