ad hoc vs central

ad hoc

adj
  • For a particular purpose. 

  • Created on the spur of the moment; impromptu. 

  • Independent of previously instated network structure, like routers or access points. 

  • Postulated solely to save a theory from being falsified, without making any new predictions. 

adv
  • On the spur of the moment. 

  • For a particular purpose. 

central

adj
  • Being very important, or key to something. 

  • Having or containing the centre of something. 

  • Being in the centre. 

  • Exerting its action towards the peripheral organs. 

noun
  • centre 

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