"Meaning: 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 . "13071"^^ . . "Frequency" . "2008-10-02T14:04:06+02:00"^^ . . . . .