Synchrony/diachrony, frequency and analogy

The synchrony/diachrony issue must be sidestepped, since the ultimate question to be studied is: which psycholinguistic limitations does the human brain impose on its representation of language. These limitations involve frequency and analogy, which are the cause of ill-understood chaos-theoretic patterns of order. In particular, analogy must be formalised, and its interaction with frequency must be further investigated.