shelf vs spoke

shelf

noun
  • A flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk etc., and used to support, store or display objects. 

  • A reef, shoal or sandbar. 

  • The part of a repository where shelvesets are stored. 

  • A projecting ledge that resembles such an object. 

  • The capacity of such an object 

spoke

noun
  • A support structure that connects the axle or the hub of a wheel to the rim. 

  • A projecting handle of a steering wheel. 

  • A rung of a ladder. 

  • One of the outlying points in a hub-and-spoke model of transportation. 

  • A device for fastening the wheel of a vehicle to prevent it from turning when going downhill. 

verb
  • simple past tense of speak 

  • To furnish (a wheel) with spokes. 

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