COPR received today for dependent child sponsorship. Exactly it took 6months for my case. Here is my time line. Hope it helps
Applied : 30/07/2018
AOR : 21/11/2018 (114 days of wait)
Add Info : 22/11/2018 (Marriage Certificate)
Medical Req: 06/12/2018
Sponsor Approval: 07/12/2018
Application transferred to CPC Mississauga : 17/12/2018
Medical done: 19/12/2018
Add info : 20/12/2018 ( Proof for sponsors maintained residence in Canada- I assume this is because of my daughter was with me in Canada when applied and she completed medicals in home county)
PPR : 07/01/2019
COPR : 30/01/2019
Thanks to all the members for the help and support during this process. Good Luck for your case.