Each time you create a new document and process a search query via the "SEO Workflow", 1 SEO Document credit will be used. This credit is different from the 30 articles/month of the AI Wizard.
For those using the Basic plans waiting for SEO Document credits to reset, the credits will go back to 0 credits used on the 1st of every month (12 AM UTC time). This is not relevant for the Team plan because there are unlimited SEO Document credits.
But you can see how many SEO Document credits you've used for the month in the "Settings" --> "Usage" page (screenshot below).