I counted freelancing as one job, being promoted to a higher grade but still doing essentially the same job, with the same title as one job, but doing a completely different job, with a different title as another job.

I think my career (wow, I've got a career, how did that happen?) illustrates that job-numbers vary wildly - although I've had nine jobs in 25 years, eight of them were in the first 15 years - the last two jobs have lasted over ten years between them.