I noticed that Stable Diffusion had no concept of the regency period, the period of British history made popular by Jane Austen novels and her many imitators. Using film stills from various adaptations, I made this LORA.
In the training data, I used tags like "regency period dress," "regency period fashion," and "regency period outfit" to describe clothing, so those tags will likely work best.
The model is biased towards photos, so you may want to use tags like "film still" or "photo" in the negative prompt.
I've been using strength between 0.5-0.7 and it seems to work pretty well at that strength.