backpacking vs touring

backpacking

noun
  • hiking and camping overnight in backcountry with one's gear carried in a backpack. 

  • low-cost, generally urban, travel with minimal luggage and frugal accommodations. 

touring

adj
  • Working for a short time in different places. 

  • Intended for a journey through a country or a region, related to tourism. 

noun
  • A touring car. 

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