It seems the noun derived from the verb "disable" is disablement.
"Disablement time" or "disablement duration" sounds a little awkward to me though. "Disable time" sounds better, and also gives much more Google hits. But would you say that is correct or acceptable? How about "disabling time"?
(Or is my question misworded; are you even supposed to use a noun in such context?)
Background: I'm trying to decide the name of a setting that specifies the time for which a certain software functionality is disabled.