spoke vs trunnion

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. 

trunnion

noun
  • A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool. 

  • A similar rotational bearing used in automotive suspensions. 

  • A shaft, held by a bearing, at each end or side of a rotatable object. 

  • One of the short stubby bearings on either side of a cannon; a gudgeon. 

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