Surely this information has been provided by the surgeon (re: what he has advised and a time frame), or is available in the surgeons notes? Advice can vary based on the variability or tissue damage, potential to heal, prevalent that the surgeon has personally observed. I would double check this first before making a decision towards a course of treatment.
If this is not possible, take a ground up approach. Check passive movement, before considering active movements, and consider equally the different phases within each (ie. passive stretch, or joint ROM, active isometric, tonic?)
Regards