Ttc,,,how long does sperm stay alive if frozen?

My husband and i decided to freeze his sperm until the next time we ovulate this wacky idea came from a friend who tried for 7 years and did this and gt preggo, has anyone ever heard of this? now period strts tommrw. Mre than likely ill ovulate around the 16th of the month. If we freeze the sperm today and leave it until ovulation will it still be fertile? or is this a pointless act? please help im desperate as u prob can see.