No Set Timeline
The time it takes depends on the horse’s age, temperament, length of break, reason for the break, prior training, rider skill, and how the horse is reintroduced.
General Steps
Start with groundwork to rebuild trust, then reintroduce the saddle and bridle, practice mounting and dismounting, and begin with short walks. Slowly add trotting and cantering before returning to specific disciplines.
Be patient, use positive reinforcement, watch body language, and consider professional help if needed.