Typically engagements last between 2-6 months. The time frame can vary greatly and depends on a wide range of factors: your goal(s), your commitment and openness to change, your capacity for introspection, your circumstances, and other unique factors. This is why we work together to establish an coaching engagemnet that works for.
I have individuals who come in for a very brief engagement (for example: one mock interview coaching session). I have others who come in focused on one goal, achieve that goal, and begin work on another goal and then another. I also have individuals who partner with me in multiple capacities and for multiple goals work with us for a year or more.