Histogram can be both 2D and 3D. By 3D I do not mean 3D bars rather threre are two variables (X and Y and frequency is plotted in Z axis).
After preparing data category (see the article), we can create a 3D histogram. So we need a two way frequency count table like this:
The insert 3D column chart. We can then modify this remove gaps (looks like a block).
We can creat columns with different shape( may be just for fun !).
We can change the type to 3D- wire frame plot.