It’s okay to put wine in the freezer to chill it down quickly.
But I wouldn’t do it with an old or fragile wine. Wine can be chilled down in the freezer quickly, but since its mostly made out of water, (roughly 84% to 88% H2O), it can freeze. The alcohol content in wine (generally between 11% and 15% abv) causes wine’s freezing temperature to be considerably lower than water, still it’s best not to leave a bottle in the freezer for more than 30-40 minutes. Flavors and aromas in wine may be altered if a wine is accidently frozen, and worse yet, the wine can expand in the bottle and explode if its left for too long.