Evolution of metal-to-stellar mass ratio as function of specific star formation rate in this metal formation rate diagram (MFRD) presented in the same way we defined the dust formation rate diagram (DFRD) showing how the specific dust mass (M_dust/M_star) changes with the specific star formation rate (SFR/M_star) in Burgarella et al. (2022). This type of diagram is normalised to M_star and allows a better comparison between galaxies. The symbols are colour-coded with the redshift. The pink shaded area presents the 2-σ confidence interval for the distribution in M_Z/M_star, and the solid black line shows the rolling average. We observe a decreasing trend with decreasing sSFR. The highest redshift galaxies are located in the lowest part of the plot.