blacklist vs encourage

blacklist

verb
  • To place on a blacklist; to mark a person or entity as one to be shunned or banned. 

noun
  • A list or set of people or entities to be shunned or banned. 

encourage

verb
  • To mentally support; to motivate, give courage, hope or spirit. 

  • To spur on, strongly recommend. 

  • To foster, give help or patronage 

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