Counting of the stars throughout the high-α and low-α sequences. Comparison between predicted and observed distributions of stars in three regions of the [Mg/Fe] vs. [Fe/H] (left panel) and [Fe/Mg] vs. [Mg/H] (right panel) abundance ratios highlighted in red, green, and blue. The respective percentages of stars are reported in the legend in the left-most plot. For the model prediction, we also indicate the percentage of stars that lie in the dilution phase of the low-α in the chemical evolution tracks highlighted with pink lines.