promo vs reassurance

promo

noun
  • an interview or monologue intended to promote a character or an upcoming match. 

verb
  • To promote; to publicize. 

reassurance

noun
  • The act of confirming someone's opinion or impression. 

  • Reinsurance. 

  • The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. 

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