caravan vs motorcade

caravan

verb
  • To travel in a caravan (procession). 

  • To travel and/or live in a caravan (vehicle). 

noun
  • A convoy or procession of travelers, their vehicles and cargo, and any pack animals, especially camels crossing a desert. 

  • A furnished vehicle towed behind a car, etc., and used as a dwelling when stationary. 

motorcade

verb
  • To travel in a motorcade. 

noun
  • A procession of cars carrying VIPs, especially political figures. 

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