https://englishmountain.com/blog/why-90-days/
Making the decision to enter into a 90-day drug treatment program can seem like an impossible commitment.

https://harmonyhealingnj.com/treatment-programs/long-term/90-day-rehab/
Harmony Healing Addiction Treatment Center offers specialized 90-day rehab programs in New Jersey designed to address drug and alcohol addiction.

https://www.addictioncenter.com/rehab-questions/how-long-does-treatment-take/
Addiction treatment at a rehab typically takes 30, 60, or 90 days. The length of treatment depends on the individual and the severity of their addiction.