commuter vs traveler

commuter

noun
  • To and from work and home. 

  • Using public transport. 

  • Normally a short form of commuter rail, commuter train or commuter bus; A transport system or a vehicle in such systems used to transport commuters (#2) 

  • One who commutes (etymology 1). 

traveler

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