district vs old town

district

noun
  • the Soho district of London 

  • An area or region marked by some distinguishing feature. 

  • An administrative division of an area. 

  • An administrative division of a county without the status of a borough. 

verb
  • To divide into administrative or other districts. 

old town

noun
  • The historic district of a city or town. 

  • Used other than figuratively or idiomatically: see old, town. 

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