If you open the Host Compute Analysis dashboard from the Navigation pane, you will see recent (24 hours) history of this metric.
And you can also open generic Performance View (while in-context) and see the detailed counter history. And of course we have reports too...
We used the Microsoft naming convention for the counters where possible, and this one is called -
Object: Hyper-V Hypervisor Logical Processor
Counter: % Total Run Time
Any other questions, let us know!