Cumulative areal coverage of the A³COSMOS database, version 20220606, as a function of 1σ_RMS sensitivity for ALMA Bands 3, 4, 6, and 7. The noise of all images in each band is normalised to the central wavelength of the band, and spatial overlaps of images are accounted for. The solid lines indicate an entire database; the image areas are considered out to a primary beam attenuation of 0.2. The dashed lines are images selected for the computation of the number counts after masking out the phase centres and cropping the edges at a primary beam attenuation of 0.3 (see Sect. 3.1). The symbols (see legend) represent the area and normalised depth of multiple ALMA blind surveys: ASPECS-LP (González-López et al. 2019, 2020), MORA (Zavala et al. 2021; Casey et al. 2021), ASAGAO (Hatsukade et al. 2018), and GOODS-ALMA (Gómez-Guijarro et al. 2022).