gentrification vs renewal

gentrification

noun
  • The renewal and rebuilding that accompanies the influx of middle class or affluent people into deteriorating areas and often displaces earlier, usually poorer, residents; any example of such a process. 

renewal

noun
  • The act of renewing. 

  • An offensive action made immediately after a parried one. 

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