this awesome old chart should do you right. Among other things, it has frequencies of quartz transparancy, FCC-allocated RF bands, the range of the human eye (distressingly small, top right ...

The analysis of frequency of consumption was complicated by a large number of zero values (non-consumers) for many food items. Frequency of consumption was thus analysed in two stages. First ...

To investigate the reproducibility of the HELENA Food Frequency Questionnaire (FFQ) developed as a basis for an online tailored intervention and to compare the FFQ with four computerized 24-h recalls.