ALMA and CONCERTO measurements for quasars. The ALMA fluxes in LF and HF are deduced from ALMA band 3 and 7 measurements (See Sect. 8.3 for details). CONCERTO and ALMA fluxes are colour corrected to a fixed effective frequency, which is derived using Uranus SED $\left(v_{\text{eff}}^{\text{Uranus }}\right)$. The first-order polynomial fitting (dashed lines) gives Jy-to-Hz calibration factors of 24.7±0.4 Hz (Jybeam^–1)^–1 and 18.8±0.4 Hz (Jybeam^–1)^–1, for LF and HF, respectively.