How many times a week in the gym is optimal?

I posted this under programming questions because it wouldn’t let me post under general discussion

I am a 400m athlete & at the moment i’m in the offseason, so currently i’m doing 5x per week weight training in the gym. I do my speed/speed endurance sessions 2x per week. I don’t want to burnout or be lacking recovery for my sprint sessions. And i’m not sure if 5 days is too much.

When track season starts, what is the optimal amount of times per week should you be in the gym to ensure best performance on the track?