The total amount of strength training sessions per week depends on your goal and desired adaptation you want to see. (christianbosse.com)
You need to do three total - body strength training sessions per week, or you can do 4 strength training workouts per week, split into two upper and two lower body sessions. (turbulencetraining.com)
At the time I had been doing 2 - 3 weekly strength training sessions, 2 - 3 days of cardio. (activemomsclub.com)