bellhop vs sherpa

bellhop

verb
  • To work as a bellhop. 

noun
  • An employee of a hotel who carries a guest's luggage and runs errands. 

sherpa

verb
  • To serve as a guide or porter for another. 

noun
  • A synthetic fabric with a long, thick pile, similar to faux fur, imitation lamb wool, or fleece. 

  • A local mountain guide or porter, particularly a male of the Nepalese Sherpa people so employed. 

  • An expert accompanying a high-ranking leader to a summit meeting. 

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