To get this particular analytics report through the dashboard, you need to first select the building you want to get this report from. You will also have to have created Events through the Cartography module of the building.

Then go to the Reports module and find the Events on the Usage Reports section.

There, you will have to choose a date range and also specify which of the events you have created for your building you want to be listed on the report.

Note: the specified date range could be the space of a day, week, month or even a year. However, this is highly dependant on the density of devices or users associated with a device so, if you a have a large density of devices, it is possible that the system limits the data to a period shorter to the one you've specified.

Once the Show Chart button is clicked, you will get the number of events in graph form.