buildup vs promo

buildup

noun
  • An accumulation; an increase; a gradual development. 

  • The construction of a composite core to repair a damaged tooth. 

promo

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

verb
  • To promote; to publicize. 

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