I had a powerlifting meeting in December, my training was frequency 1, training a single basic every day. The program lasted about 6 months. I started with more volume and I increased the intensity and reduced the volume durgin the weeks.
The competition was Saturday, so this was what I did the last few days.
Squat 3x1 95%
Press 3x1 95%
Deadlift 3x1 at 95%
Monday: Squat and bench press, only one of a repetition, with the weight you will use on your first attempt on the day of the competition.
Tuesday: Deadweight, only one of a repetition, with the weight you will use on your first attempt on the day of the competition.
Wednesday, Thursday and Friday go for a walk and do some stretching. If you need to lose weight, cut solid foods, reduce salt on Friday and make a water cut at 20:00.