In File Explorer, when quick access is selected, the groups "Frequent Folders" and "Recent Files" are missing from the display. Only the items listed directly below "Quick Access" (which used to be called "favorites") in the Nav pane are displayed in the right side of the window. Checking "Show recently used files in Quick access" and "Show frequently used folders in Quick access" in View-> Folder Options has no effect.
I'm using Windows 10 Pro 64-bit with the 8-5 cumulative update.