gentrification vs restoration

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. 

restoration

noun
  • The return of a former monarchy or monarch to power, usually after having been forced to step down. 

  • The process of bringing an object back to its original state; the process of restoring something. 

  • The receiving of a sinner to divine favor. 

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