windows 2016 cluster QuarantineThreshold

https://blogs.msdn.microsoft.com/clustering/2015/06/03/virtual-machine-compute-resiliency-in-windows-server-2016/

QuarantineThreshold means Number of failures before a node is Quarantined. I have some questions

1. which kind of error will count as "failures?

2. I see cluster log there something about Quarantined:

"the node experienced '3' consecutive failures within a SHORT amount of time"

what short is defining here ? 1s ? 2s ? 2 mins ? consecutive SAME KIND of failures ?