gentrification vs reconstruction

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. 

reconstruction

noun
  • The act of restoring something to an earlier state. 

  • A result of linguistic reconstruction; a model representing an unattested linguistic unit: a phoneme, a morpheme or a word. 

  • A result of an attempt to understand in detail how a certain result or event occurred. 

  • A thing that has been reconstructed or restored to an earlier state. 

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