Indeed you can try to use the Report Manager to try to do this but I dont think it will work since the tables for VNQM contains the same hour all the time.
I did a query to actually poll the data from the DB, I will try share below.
Example of a SQL query to retrieve data for ICMP ECHO operations
SELECT sourcenodeid, targetnodeid, avg(avgroundtriptime) as Average
WHERE datepart(hh, [DateTime]) > 7
and datepart(hh, [DateTime]) < 19
and voipoperationtypeid = 5
group by sourcenodeid, targetnodeid
On the query above I am getting sourcenodeid, targetnodeid and average of roundtriptime for a time between 7 and 19 hours for each day.
Finally the filter is on voipoperationtypeid in this case is 5 for ICMP ECHO.
The full table of Operation Types can be found on the table VoipOperationTypes