crampon vs walking frame

crampon

noun
  • An attachment to a shoe or boot that provides traction by means of spikes. Used for climbing or walking on slippery surfaces, especially ice. 

  • A heraldic figure in the form of a bar bent at the ends into the form of a hook. 

  • An aerial rootlet for support in climbing, as of ivy. 

verb
  • To walk or climb using crampons. 

walking frame

noun
  • A framework device used to support either an infant learning to walk or a person with walking difficulties. 

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