flagpole vs range pole

flagpole

noun
  • A tall pole up which one or more flags may be raised and flown. 

verb
  • Exit a country momentarily and reenter. Usually this is done to satisfy immigration requirements. 

range pole

noun
  • A rod or pole, marked with alternating red and white bands, used by surveyors for sighting 

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