centralization vs conciliation

centralization

noun
  • The act or process of centralizing, or the state of being centralized; the act or process of combining or reducing several parts into a whole 

conciliation

noun
  • The process of bringing peace and harmony; the ending of strife. 

  • A form of alternative dispute resolution, similar to but less formal than mediation, in which the parties bring their dispute to a neutral third party, who helps lower tensions, improve communications and explore possible solutions. 

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