Thank you for the question, Jocelyn! The Activity reports were originally developed to display actual activity within your Digital Workplace and thus excluded items that have zero activity.
However, your use case is quite compelling and is relatively easy to accommodate within the existing report structures. As a result, I have updated the Wiki Article Activity report to include activity with a count of zero in the Trend View section. You can then filter to just views and order by those items by Count ascending to find a quick list of all the Wiki Articles with zero views in that time period.
Note that the Table View page of the report still excludes items with an activity count of zero as this view is a direct display of actions that took place within the Digital Workplace.
This update will be made for the other Content and Container reports as well to accommodate this use case.
Thank you again for the feedback. Please let us know if there are any additional use cases that you would like to see implemented in these reports.