A week in the crystal sounds somewhat boring, but it should give me time to formulate a more cohesive argument against your stance... very well, Mr. Ganondorf, I will accept this time within the crystal and I will return with more points to make.
Or he could have meant some people have been in the crystal for what feels like a century TO THEM, which would mean they were actually in there for 5218 minutes or about 3.6 days
If 1 minute = 1 week in the crystal, then 52 minutes = 1 year. That means that a century trapped in the crystal would be roughly 520 minutes, or 8 hours and 37 minutes, in 'real' time.