civil vs interurban

civil

adj
  • Relating to private relations among citizens, as opposed to criminal matters. 

  • Secular. 

  • Having to do with people and government office as opposed to the military or religion. 

  • Behaving in a reasonable or polite manner. 

interurban

adj
  • Of, pertaining to, involving or joining two or more urban centres 

noun
  • An electric railway carrying mainly passengers between two or more urban centres. 

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