middle rib vs nerve

middle rib

noun
  • The main vein of a simple leaf or leaflet, running from the petiole to its apex, and from which the other veins usually spread. 

  • The continuation of the petiole of a pinnately compound leaf around which the leaflets attach. 

  • A cut of beef between the chuck rib and fore ribs. 

nerve

noun
  • A vein in a leaf; a grain in wood. 

  • A neuron. 

  • The elastic resistance of raw rubber or other polymers to permanent deformation during processing. 

  • mental agitation caused by fear, stress or other negative emotions. 

  • Patience; stamina; endurance, fortitude. 

  • A bundle of neurons with their connective tissue sheaths, blood vessels and lymphatics. 

  • Courage; boldness; audacity; gall. 

  • One's neural structures considered collectively as, and conceptually equated with, one's psyche; 

verb
  • May their example nerve us to face the enemy. 

  • To give strength; to supply energy or vigour. 

  • To give courage. 

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