Histograms of weighted means (number of measurements) of f_b of individual systems. Left panels: Systems with a minimum number of selected f_b equal to two (AH Men, BB Dor, KQ Mon, KR Aur, MV Lyr, QU Car, TT Ari, V504 Cen, V592 Cas, V704 And, V751 Cyg, V795 Her, V1193 Ori, HS 0506+7725, and TIC 92167387). Right panels: Systems with a minimum number of selected f_b equal to five (AH Men, BB Dor, KR Aur, MV Lyr, TT Ari, V592 Cas, V751 Cyg, V795 Her, V1193 Ori, and HS 0506+7725). Upper panels: Measurements from this paper. Lower panels: Same as upper panels, but with added measurements from other works. The red line represents the uncertain V4743 Sgr case.