^Well.. Silkroad is more grinding. It takes a good day to make level 20. After that.. Ohh boy. You're in for grinding. I don't remember the levels of 20~50, nbut I do remember how long it took for the others.
Level 50~60 takes around.. a week. Depending if you have gold ticket(100% more exp) and played at least 3 hours a day.
Level 60~70 takes.. Wow.. x2 as 50~60. Around 2 weeks.
You can just bot all the way in a month or hand grind and takes around 1~3 months.(Depending on how you play. That is if you are serious)