It took us about two months.
She was also already 9 years old and had been used on trails and things up until that point. I'd say that she was more than ready to start on the pattern and she has an "ooh! That was fun!! Let's do that again!!!" mindset.
I love her. Unfortunately, I then got a finished barrel horse (at my father's request) and didn't have time for her so she went back to my aunt's house... I just barely got her back a couple of days ago and am going to finish her! Now I need to find out where she's going to pick back up again!