Because of my work schedule, studying at night after work was my only option unless I wanted to wake up at 3 or 4am to study before getting to the office by 7:30am. Which would have been terrible (see: sleep deprivation).
During the week I would study at night 3-4 weeknights per week. I’d also study at lunch 4 days per week, which was about 30-45 minutes. So, on work days I was studying, I was probably getting 3-4 hours in per day in total. I’d usually take all of Friday off (lunch and the evening) and then take another evening off depending on the week (typically Tuesday or Wednesday). By giving myself all of Friday off, I was able to better avoid burnout. I spent most of the weekends studying, with my times on those days increasing as the exam approached. And by setting this schedule, I largely prevented myself from inventing reasons not to study.