> It doesn't look like an indicator of the diachronic change in the popularity… I thought all change is diachronic.* I looked it up and found out that ‘diachr

> It doesn't look like an indicator of the diachronic change in the popularity… I thought all change is diachronic.* I looked it up and found out that ‘diachrony’ is a term of art in linguistic analysis, contrasting with synchronic analysis. https://en.wikipedia.org/wiki/Diachrony_and_synchrony https://en.wikipedia.org/wiki/Diachrony_and_synchrony *Edit: I initially thought that saying ‘diachronic change’ was like saying ‘three-sided triangle’. But thinking about it, I suppose things do change in space but not time, e.g ‘the pattern changes abruptly’