Once or twice is pretty standard.
Generally, once is enough until you pinpoint a specific weakness in your movement. You won't be able to pinpoint a weakness until you're benching at least +1.5x your bodyweight for reps.
A lot of strong guys cut the volume of their bench day in half and double the frequency (two days instead of one, with half the work each session).
Broken into one strength day and one hypertrophy/power day. Low rep, high weight & lower weight, higher rep + speed or tempo work. That is for advanced lifters who've been grinding away for the better part of a decade though.
As long as the trendline of your strength is positive over a 12-18 week period then just keep doing what you're doing and focus on getting other balls in the air (good training is like juggling; diet, rest, training, cardio, lifestyle). As long as the weight is going up then focus on getting your posterior chain work done, if that's working then focus on your diet and simplifying it so you don't spend so long each day/week cooking and food preparing. Then focus on getting enough protein in and all that stuff. There's a lot to think about besides Bench Press, which will indirectly increase your strength in that and other movements.