tropology

noun
  1. 1

    The use of a trope (metaphor or figure of speech).

  2. 2

    The interpretation of scripture or other work in order to educe moral or figurative meaning; a treatise of such interpretation.

  3. 3

    A recurring motif or metaphor, a trope; an interplay of tropes.

Source: https://en.wiktionary.org/wiki/tropology