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Use "nonbillable" in a sentence
""Billable hours, nonbillable time demands, singular career development path, highly hierarchical/stratified structure ... it's a wonder that institutions as dysfunctional as [large law] firms have survived this long," wrote one."
"(You should figure that 25% to 35% of your working hours will be spent on nonbillable tasks.)"
"But what they are saying translates in my profession to "nonbillable hours.""