promo vs sales pitch

promo

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

verb
  • To promote; to publicize. 

sales pitch

noun
  • Talk or demonstrations intended to persuade a consumer to make a purchase, especially when vigorously delivered or exaggerated. 

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