Histograms of the mass distribution (in log scale) of the cores in the combined young + intermediate regions (top panel) and evolved regions (bottom panel). The shaded red and blue areas show the cores with single-type DCN (3–2) and complex-type spectra, respectively. The dashed black line represents cores with a DCN (3–2) non-detection. The red, blue, and black dashed vertical lines represent the average mass values (top: 5.6 M_⊙, 20.1 M_⊙, and 3.1 M_⊙; bottom: 3.6 M_⊙, 10.2 M_⊙, and 1.8 M_⊙) for the single-, complex-type, and non-detections, respectively. We find that the complex-type cores have an average mass nearly an order of magnitude higher than those without a DCN (3–2) detection and around three times higher than cores with a single-type DCN detection, regardless of evolutionary class.