I’m pretty sure it’s around 6 months or so before you need a requal. I was gone for 2 years and did a “long” requal, and that was only 2 ground days, 2 sims and a check. Not nearly enough. Give training a call and ask. Always argue for the longest possible course you can get.
Unless you didn’t consolidate, you won’t get the full course unless you are gone for several years.