Molecular gas depletion time ﹩{\tau }_{\mathrm{depl}}﹩ versus various galaxy properties (from left to right): redshift, cosmic age, ﹩{\rm{\Delta }}\mathrm{MS}﹩, ﹩{M}_{\star }﹩, ﹩\mathrm{SFR}﹩, and sSFR, respectively (see Section 4). For each distribution, we show two vertically adjacent panels: the upper panel shows the scatter plot, and the lower panel provides density contours. In the scatter plots, data points are color coded by ﹩{M}_{\star }﹩ in the first two top panels and by redshift (in ﹩{\mathrm{log}}_{10}(1+z)﹩ scale, but tick labels are z) in the remaining panels. In the contour plots, we divide the sample into three main subsamples: orange solid contours represent the A³COSMOS galaxies (﹩0.5\lesssim z\lesssim 6﹩), green dashed contours the PHIBSS 1&2 galaxies (﹩0.5\lesssim z\lesssim 2﹩), and gray dotted contours are all other local/low-z galaxies.