We must imagine a bridge that is built by operations, which take us from the (qualitative) concepts of literary theory to (quantitative) measurement results. This implies existence of a simple and easy way to connect a concept C to an indicator I, resulting in a straightforward measure, which allows inferences, like the more I, the more C. Finally numbers are assigned to produce a measurement metric, be it by counting words or by using more elaborate techniques, like network analysis. In his paper, Moretti gives examples to show how this can be done, but he does not provide a detailed and generalized method that can be followed in different contexts. We therefore specify our question even further: