. "2006-05-19T13:46:16+02:00"^^ . "Fre" . . "10096"^^ . . . "Frequency" . . "This frame element is defined as the number of times an event occurs per some unit of time. A Frequency expression answers the question how often. It is to be distinguished from Iteration, which pertains simply to the number of times an event occurs-Iteration expressions answer the question how many times."@en . .