While treatment lengths vary somewhat from person to person and from condition to condition, there are a few rules of thumb you can follow.
First, newer injuries, if treated appropriately and immediately, tend to respond to fewer visits assuming that major tissue injury has not occurred. Many of these first time injuries can be effectively managed in as little as 3 to 4 visits. Conditions that have been present for greater than 3 months and recurring conditions are generally more stubborn and difficult to manage. Resolution may require 12 visits or more.
The only sure way to determine how long your treatment will take is to schedule a consultation and/or examination.