That's worse actually. It means that your shower every 12 fortnights was what you did, and then ignored all hygene until your next shower.
An annual car service is like trying to build Rome, but only spending 1 day a year on it. The other 354 days, idiots will go "THIS IS SPARTAAAAA" and break it, so every year, you're back to start again. Now if you worked at it consistently, you'd actually have Rome completed, rather than having a shitty, poorly maintained and un-road-worthy Rome.