Hi Kevin,
You can see this with another T-code also Like ST03
Go to transaction:-ST03-->export mode-- workload-->particular date(on which date you require) then double click on it.
Then go to Analysis view--> time profile. Here you find time interval. Double click on it .You will found how much transactions are using in this time.
Also use User statement statics --> user profile--> double click on it. you will found ,who will using the particular T-code.
Thanks & Regards,
Bhipra Sakti