in transit vs on the road

in transit

prep
  • In the process of being transported. 

on the road

prep
  • travelling 

  • At the venue of an opposing team or competitor. 

  • Of a purchased vehicle: including everything required in order to start driving, such as registration and taxes. 

  • Used other than figuratively or idiomatically: see on, the, road. 

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