SQL query to determine access to archived items?

Hi,

assuming I don't want to enable auditing or install reporting services.

Is there a query I can run against vault store DB to determine user access rate to archived items in the past week by hours?

I have a scheduled evening upgrade, and the customer is concerned that we will cause many users to not be able to work correctly. (no vault cache)
I'm trying to think of a simple query that I can run against the vault store DB that will give me in results how many users accessed archived items between 18PM to 00PM, so I can show him "you see? only 9 people out of 25,000 tried to open archived item"...

any ideas?

Is it even possible?

Sarah