If ur talking DCF in Canada, I believe as of Aug 11 that is no longer an option in Canada.
Best site to get the info is visajourney.com!
For
k1 (fiance) can be anywhere from 6-9 months and the CR-1//Ir-1(already married) can be aroun d9 months +.
LOT of info on the relationship visas on VJ Step by step instructions, examples of filled out forms, makes it very very easy! The worst part is the waiting. At the top of the appropriate forum are guides that give u the directions. Best of luck