Microsoft Access query to retrieve random transactions with seemingly impossible criteria

I was asked to assist with developing a report to retrieve a 25% sample of random transactions within a specific date range. I am not a programmer but I was able to devise the following fairly quickly:

SELECT TOP 25 PERCENT account.CID, account.ACCT, account.NAME, log.DATE, log.action_txt, log.field_nm, log.from_data, log.to_data, log.tran_id, log.init 
FROM account INNER JOIN log ON account.ACCT = log.ACCT
GROUP BY account.CID, account.ACCT, account.NAME, log.DATE, log.action_txt, log.field_nm, log.from_data, log.to_data, log.tran_id, log.init
HAVING (((log.DATE) Between #2/7/2018# And #6/15/2018#) AND ((log.action_txt)="mod" Or (log.action_txt)="del") AND ((log.init)="J1X" 
ORDER BY log.tran_dt

This returns 25% of the records within the date range. Each record row is unique but each account number potentially has multiple records on each day. In some cases the records have the same date and tran_id as well.

Upon further discussion with the requester, he actually wants to see all of the transactions for 25% of the accounts that have activity on each day within the date range. Thus if there were 100 accounts on 3/1/2018 with records in this table, he wants to see all of the transactions for 25 of those accounts; if there were 60 accounts on 3/2/2018 with records in this table, he wants to see all of the transactions for 15 of those accounts; and so on.

I was thinking that an Access module would work best in this scenario as I believe there are multiple parts to this. I figured that I need a function to loop through the date range and for each day: 1. Count the account numbers only one time 2. Return all of the transactions for 25% of the total accounts

But as I mentioned, I am not a programmer and I am exhausted from searching possible solutions for the many parts.