Figure shows water diffusion data on CALF-20. Typically, measuring water diffusion with CSFR takes around 20+ hours of experimental time since the frequencies required are as low as 0.0001 Hz, and several hours of data collection per frequency are necessary at the lowest frequencies. However, with FT-CSFR, the experimental time required is only about 8 hours due to using multiple harmonics. Leveraging the increased throughput of the FT method, data was collected at a greater number of relative humidites than previously reported (Figure ).