Histogram charts are single-series column charts to show the continuous evolution of a value. Histograms are used to show distributions of variables and plot quantitative data with ranges of the data grouped into intervals. Bar chart may look similar, but they are used to compare variables and plot categorical data.
Our US Sales demo charts show the distribution of quantities sold in each year between 2000 and 2016, in US. This is a single-series chart (US), with a category X axis in this case, in which each year value is placed at a regular interval. All columns have the same color, unless you also use negative values with alternate colors. This chart looks similar to a single-series column chart, but its purpose may be different.