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Weekly set volume per muscle group is the main driver of hypertrophy, with 10-20 sets a common target. Six groups at 14 sets is 84 weekly sets, which across four sessions means 21 sets each - about 84 minutes at three and a half minutes per set including rest. If that exceeds what fits, either add a session or trim volume.
Weekly volume
total sets = muscle groups x sets per group
Per session
sets per session = total sets / sessions per week
This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
Meta-analyses point to 10-20 as the productive range for most trainees, with diminishing and eventually negative returns beyond that.
Less than volume, but training a group twice a week rather than once makes high volumes easier to complete with good quality.