AKA: Volunteer Hours?

HI. I am a prospective member of Alpha Kappa Alpha, and i have a question. I read in the packet that only volunteer hours 2 years prior to MIP will be accepted. Does that mean you have you to volunteer 2 years before you apply or any hours within a 2 year period are fine? I really need to know because im too shy and concerned about secrecy to ask any of the members on my campus.