Historical | Split/Skill reports: Summary Interval is going to give you reports based on how you collect data intervals (15 min, 30 min, 1 hour) depends on what your system is set to for the amount of time in the interval. You might not be able to go back very far depending on how the Data Allocation is setup. Some companies only store 31 days of interval, some 2 months, but not much more, it's all due to storage limitations.
- Stinney
“The man who asks a question is a fool for a minute, the man who does not ask is a fool for life.” - Confucius