The state of being intermittent; periodicity(noun)
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Use "intermittency" in a sentence
""As we put more 'intermittency' - wind and solar - into our system we need the balancing resources for those times when they are not available," says Arshad Mansoor, vice president of power delivery and utilization for the"
"That inconsistency--called intermittency in the trade--produces an inferior product at inflated cost."
"One interesting point made during the public discussion concerned intermittency, that is times when alternative generation is not producing enough power to meet demand."