Definition of historiometry in English:
historiometry
noun hɪˌstɒrɪˈɒmɪtriˌhɪstɒrɪˈɒmɪtrihɪˌstɔːrɪˈɒmɪtri
The statistical analysis of historical data in order to make a quantitative assessment or comparison of particular historical figures, events, or phenomena; the science or study of this.
Origin
Early 20th century. From historio- + -metry.