Definition of "failure rate" []

• The frequency with which an engineered system or component fails, expressed for example in failures per hour. (noun)

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• "Indeed, until he was drafted, he was a humble marriage counselor whose 80 percent failure rate made him the most successful counselor throughout Deimos."
• "“When you add all those up,” comments John Petersen, national service manager of Montgomery Ward and Company, “the failure rate has to be higher.”"