How do I handle a long gap on my résumé? after 9 years as a marketing coordinator

My résumé shows a gap from a layoff and some health issues. I am not sure how much to explain. What do you say in interviews?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

I was hired after a 14-month gap. The manager said the skills test mattered more than the dates.