"2007-05-21T12:33:29+02:00"^^ . . . . "Frequency" . "Frequency"^^ . "A characterization of the average number of times a visit happens over a period of time."@en . . "11819"^^ . . "Frequency" . . . . "Extra-Thematic" . "Extra-Thematic"^^ . "RLG" . "fre" . "A characterization of the average number of times a visit happens over a period of time."@en . . "A characterization of the average number of times a visit happens over a period of time."^^ . .