I check in on Wednesday morning (five days later) about a Friday afternoon timeline. Erin replies at 4pm on Friday; I reply seven minutes later.
I post an update on Sunday. A quick series of emails on Monday and Tuesday establishes a call for the following week:
I check back in the morning of the call:
Erin did not respond to me. Erin wrote to my boss at work, who replied with information Erin already had: