How to get create a histogram over time?

Question

I'm trying to visualize how a distribution changes over time -- each vertical slice should be the distribution at that timestep.

I want it to look something like this (there are two such curves/temporal-histograms here).

The closest I've found is this seaborn time series, but I want the distribution or at least the min, mean, and max -- this band is a confidence interval, which I can't use (it's also prohibitively slow). https://seaborn.pydata.org/examples/errorband_lineplots.html