Hi Angela,
have you checked SAP Note "1582700 - GRC AC 10.0 Workflow Reminders - Correction of behavior"?
from note:
P_PERIOD = identifies which pending workflow requests are identified as due for reminding
example: P_PERIOD = 1 -> Requests that have been pending for 1 day or more are selected
Just to clarify your scenario:
1. In your setup, if original approver has not processed request in 5 days, it is sent (escalated) to alternate approver (or other agent)?
2. Do you want to send daily reminder to original approver during the 5 days before request is escalated?
/Antti