a superfluity of something
From Longman Dictionary of Contemporary Englisha superfluity of somethinga superfluity of something formalTOO/TOO MUCHa larger amount of something than is necessary → superfluityExamples from the Corpusa superfluity of something• There were the Station dances, the weekly cinema shows, and a superfluity of men.• In this sense, daydreaming is purposeful - not merely a random response to a superfluity of mentally unoccupied time: Daydreaming?