. . "Frequency" . "Frequency"^^ . "An expression of how often the event occurs."@en . . . "MJE" . "An expression of how often the event occurs."@en . . . "12916"^^ . . "An expression of how often the event occurs."^^ . "fre" . . "2008-06-24T13:29:37+02:00"^^ . . "Frequency" . "Extra-Thematic" . . "Extra-Thematic"^^ .