Total number of Unique page(s) recorded in a time frame

[#1]

Is there a way to get a report that shows the number of unique page names seen over the period of the report.

I know I can do a pages report and then 'go to page' 10000 at the end of the report to find the last page that has a recorded page view by it's number in the list.

but is there a way to get this number via a report? Not the number of page views but the number of pages with the page view metric attributed to them.

[#2]

You can use a serialized event to track your unique page views. Use a UNIQUE hash value for each page as the Serialization ID.
Depending on your requirement you can include date, month, week etc while generating the hash key

https://marketing.adobe.com/resources/help/en_US/sc/implement/event_serialization_impl.html

Cheers