To add series to a table simply use the “Add new” button at the top of the edit screen for a table. You can also use the edit button next to “Add new” to rename series.
Within the settings it is possible to adjust items per series. For example, it is possible to create a table with different intervals as shown below. The table shows weeks, months and years in columns.
The Interval and moving average settings are available also in the Sub series as shown in the image below.