years are years. If you've known how to do something, and been doing it in some small way over the past 10 years, it doesn't matter if some was part-time, some

years are years. If you've known how to do something, and been doing it in some small way over the past 10 years, it doesn't matter if some was part-time, some full-time, some on your own in the basement. You've been practicing/doing it for 10 years. Now whether you became proficient in it over that 10 years is another matter...