2x a week for older folks works better for many of us. Also works well when what you can lift is pretty heavy. The 5/3/1 basic template is 4x a week but it's only one lift each of those days, so you end up only squatting once a week. Seems most of the other variations are still only 1x a week for any particular lift. This might also be easier for you to recover from.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 192.5lbs, press 75lbs and deadlift 210lbs