Shedding question

[Brently]

I have read that a general schedule of shedding for a young boa is about every 6 weeks. My girl Athena seems to shed about every 8 or 9. I know that isn't a big difference. She is healthy and has grown a great deal since I have gotten her. I am just wondering if the disparity in time could be caused by me. Or is it just her natural rate. She eats once a week, small rats about 60-70 grams, she is about 700-800 grams approximately 2 3/4 ft long. She is a very good eater who never turns down food. I am not sure if she is bcc or bci. Sold as a red-tail of course. I am not worried about her, this is more a question for the sake of education. Also I would like to figure out subspecies specificity if possible any tips?