Probationary period is a year (or longer, depending on agency). help.usajobs.gov/working-in-g... Attrition averaged >6% per year for the last several years. Replacing those employees (and growing a bit) can get you to 10% probationary pretty quickly.

No. You were probationary during your first year. Probationary does not mean temporary; it just means "new."

"...and he's about to find out that being a stapler is harder than it looks..." #DerpDeeDer