Hi, I'm sorry to hear about your friend's daughter. Unfortunately what she needs is therapy and perhaps to research co dependence.
The Freedom Programme is actually free, if she contacts her local domestic abuse organisation, they may be able to offer similar groups or know of programmes in her area similar to the Freedom Programme.
She obviously needs support. She could check out Co dependence No More by Melody Beattie.
CoDA may be running online support during the lockdown and they are certainly worth exploring. They are free.
Her local GP may be of help and know what's available in the area. It's always worthwhile documenting the abuse with the GP should she need evidence in the future.
The Verbally Abusive Relationship is a good book and I believe Why Does He Do That? by Lundy is knocking around free somewhere.
Ultimately she needs therapy. If she has no money then she may be able to get reduced rate or free therapy. She needs to do an internet search and find out what's available in her area and through her local domestic abuse organisation.
If she keeps getting into abusive relationship this is because a. that's all she knows and b. her self esteem will be very low c. she is the daughter of addicts (alcoholics/drugs) or grew up around mental health issues that have somehow pushed her into a caretaking role and made her a 'rescurer'. She needs to unpack that in therapy.