So the answer is basically speculation and imagination?
Saying she used nandrolone before is personal speculation.
The term "low" actually comes from WADA. They call values below 10 ng/ml, like Houlihan's, "in the low ng/ml range", and this low range is "usual" "following consumption of the edible parts of non-castrated male pigs" "although higher concentrations have been exceptionally reported". In fact values more than 20x Houlihan's, from pork offal ingestion, have been reported.
Your conclusion about "intentional" is incorrect and not how WADA deems intent.
Given nandrolone's low bio-availability by ingestion, as most of it will be filtered out in "first-pass", never making it into the blood, it's not clear any season is "the best time".
The original claim was "she ... cheated clean runners out of Worlds and Olympics", which also looks like personal speculation.