. . "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 . "Fre" . "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. "^^ . . "2006-11-17T12:36:20+01:00"^^ . "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 . . . "Frequency" . "Frequency"^^ . "KmG" . . . "Extra-Thematic"^^ . "Extra-Thematic" . "Frequency" . . "10840"^^ . .