The Downloads by time of day report covers downloads over the course of a week (Sun - Sat) by time of day, per hour.
The Download Time report is accessible from your reporting dashboard under the "Analytics" tab. Scroll to locate the report titled "Consumption by time of the day" and filter to view "Downloads".
You can view this report in either Table view or Graph view (the below examples are shown in Graph view).
This report measures downloads in a heat map, meaning the hours with more downloads will be darker than those with fewer downloads. Hovering on a cell will display the downloads for that given time/day.
The report automatically filters for the range selected and gives the averages for a typical week across your podcasts.