metro vs platform

metro

noun
  • A metropolitan area. 

  • An urban rapid transit rail transport system, normally with lighter track and light trains (i.e. an S-Bahn or similar), or a train in such systems. 

  • A rapid transit rail transport system, or a train in such systems, generally underground and serving a metropolitan area. 

adj
  • metropolitan 

platform

noun
  • sidewalk 

  • Something that allows an enterprise to advance. 

  • A place or an opportunity to express one's opinion. 

  • A raised structure from which passengers can enter or leave a train, metro etc. 

  • A raised floor for any purpose, e.g. for workmen during construction, or formerly for military cannon. 

  • A flat expanse of rock, often the result of wave erosion. 

  • A political stance on a broad set of issues, which are called planks. 

  • A raised stage from which speeches are made and on which musical and other performances are made. 

  • A light deck, usually placed in a section of the hold or over the floor of the magazine. 

verb
  • To include in a political platform 

  • To place on, or as if on, a platform. 

  • To place a train alongside a station platform. 

  • To furnish with or shape into a platform 

  • To publish or make visible; to provide a platform for (a topic etc.). 

  • To open (a film) in a small number of theaters before a broader release in order to generate enthusiasm. 

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