Document Set Field Synchronization Job - SharePoint Online

How long will it take for the Document Set Field Synchronization job to trickle down shared column values from Document Sets to the Documents within, in SharePoint Online ? I have a huge library with 100,000+ item count (no comments on having such a huge library), and it is more than an week and the job hasn't updated everything yet. Although it has updated for around 20% (seems like !) and still in progress, it is a challenge to determine the velocity of the updates and frequency of this Job in SPO.