How long does a fifth of vodka last you?

I’ve recently quit my nightly bottle of wine habit, which I’m really happy about. I’m pursuing moderation and simply don’t have an off switch when it comes to wine. Seltzers or a vodka soda are much easier for me to limit. I bought a fifth of vodka 6 days ago and it’s almost gone. I’m not a seasoned liquor drinker so help me out- is a fifth a lot to go through in basically a week give or take?