One problem with long term storage of around 5 years in the freezer is embrittlement and sticking of the emulsion — the film may actually tear/snap unexpectedly. It needs as a minimum 24 hours to thaw out. If you have a camera that is manually wound on, load a roll in that and expose every frame with the lens cap on, then rewind it. This will demonstrate whether the film jams or winds on without any problem. In a camera with a motor drive the speed of the drive is what has been known to fracture the emulsion. I have experienced this with films stored for 6 years in deep freeze (Velvia 50 and also E100VS).