central vs centric

central

adj

  • Being in the centre. 

  • Having or containing the centre of something. 

  • Exerting its action towards the peripheral organs. 

  • Being very important, or key to something. 

noun

  • centre 

centric

adj

  • Being in the centre; central. 

  • Pertaining to a nerve centre. 

  • Being a member of the subclass Coscinodiscophyceae (corresponding to the Centrales.) 

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