. . "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.\""@en . "14523"^^ . "Frequency" . "RLG" . . "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.\""@en . . . "2011-07-14T13:08:44+02:00"^^ . "fre" . "Frequency" . "Extra-Thematic" .