. "Fre" . . "Frequency" . . "2005-11-10T11:54:21+01:00"^^ . . "This frame element is defined as the number of times assessing occurs per some unit of time. Brown 's chapter on geodemographics discusses an application field where primary data collected for operational purposes are typically evaluated in relation to secondary data derived from sources such as the Census of Population ."@en . "9197"^^ . . .