The breakdown of the fields are as follows:
1Hour - the current count for the current hour (past 60 minutes).
1HourH - This is the historical count for the hour prior to the current hour (past 61-120 minutes)
1Week is for the current count of the current week (past 7 days).
1WeekH - This is the historical count for the week prior to the current week (past 8-14 days)
I believe there is also a 2Week field which would just be the 1Week+1WeekH count.