How quickly does traffic steering react on a healthcheck

Summary:

When I have setup Traffic Management Steering Policies based on the Failover Policy Type, I have been unable to view the server change on the linked domains, even though the healthcheck was showing that the server was unavailable (and the failover server was available).

Content (required):

Under the Traffic Steering section, I have two servers set in order, the current server is the priority and the second server is the failover. Under Policy Narrative, the Max Count is 1. I believe this value could not be changed, due to the Failover scenario chosen.

In the DNS Zone against the chosen subdomains, to be affected by the traffic steering, I see the primary server ip address followed by "occluded by Steering Policy". It's this area where I am unsure if the setup is correct, as the value didn't change (not that I am sure if it should have done), but refreshing the website still gave me the unavailable version.