Most writing apprenticeships are a few years. I've heard 'ten' bandied around as a popular, general figure amongst my Romance Writers of Australia friends.
Since mine was 23 years - yes, 23! - I decided to name my blog I'm writing for Romance Junkies' on July 17th The 'Getting Published' Toolkit and list the five main reasons it took me so long to get published.
The blog post is also a celebration of the release of my 6th book - The Cavalier - an erotic English Civil War romantic novella which is due for release on July 16th. That's tomorrow!