Can I enter another period of in-school forbearance if I was already in one for just one semester?

I started college in 2002 and stopped attending after the spring of 2004 semester. After my six month grace period, I entered deferment on my federal loans and I'm not entirely certain about my private loans. I then started college again in the spring of 2005 so my deferment/forbearance period became a period of in-school deferment/forbearance. I stopped attending after that semester and since I had already used my six month grace period, I immediately began making repayments. I have been back in college now for the past year and will be so for another year to come. I contacted my lender and was told I could have in-school forbearance. I am unsure whether or not this guy was entirely certain about what he was telling me! Does any one know if I can enter another period of in-school forbearance after having already been in one for just one semester a couple years ago?