A dual-frequency, multi-component mixture was investigated by means of dielectric spectroscopy in a wide frequency range (100 Hz–10 MHz) as well as in a wide temperature range (−70°C to 140°C) on a cooling cycle. This nematic mixture changes the sign of dielectric anisotropy with temperature and frequency. Measurements were carried out in 5 µm thin cells with gold electrodes for homogenous (HG) and homeotropic (HT) alignments. Results help us to calculate with high precision: relaxation frequencies of molecular motions (around short (S) and long (L) molecular axes) and dielectric strengths (δε) of both mentioned modes. It seems that both motions are of Debye type. In low temperature region, these motions are highly hindered and it allows us to observe intra-molecular motions that are typically (for room temperature) observed in THz frequency range. S molecular motion is eliminated from the measurement range, for temperatures below −15°C, while L molecular motions disappears below −70°C.