old town vs town

old town

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

  • The historic district of a city or town. 

town

noun
  • Used to refer to a town or similar entity under discussion. 

  • The residents (as opposed to gown: the students, faculty, etc.) of a community which is the site of a university. 

  • London, especially central London. 

  • A municipal organization, such as a corporation, defined by the laws of the entity of which it is a part. 

  • Any more urbanized centre than the place of reference. 

  • A major city, especially one where the speaker is located. 

  • A rural settlement in which a market was held at least once a week. 

  • A settlement; an area with residential districts, shops and amenities, and its own local government; especially one larger than a village and smaller than a city, historically enclosed by a fence or walls, with total populations ranging from several hundred to more than a hundred thousand (as of the early 21st century) 

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