Timeline chart is a type of chart that visually shows the chronological sequence of past or future events on a timescale. The chart’s timescale can be in days, weeks, months, quarters, years or other units of time depending on the type of events shown on it.
Multi-category chart or multi-level category chart is a chart type that has both main category and subcategory labels. This type of chart is useful when you have figures for items that belong to different categories.
When visually comparing the values of multiple items, if the value of one item is greater than the total values of all the other items, you may want to emphasize it. You can do so by displaying the largest value in one bar and grouping the smaller values together in another bar in a combined clustered and stacked bar chart.