Findings:

• blue rare
• Mister Chu on a rare day in June
• we had shared nothing rare
• Usage
• Please cut back on your car usage
• upside-down mouse usage
• disk usage under UNIX
• Elementary Rules of Usage
• Step.rc usage of conditionals
• Usage of the Sony Playstation 2 controller as a back massage device
• Rare Flesh
• The Law of Common Usage
• Dutch Profanity: Categories and Usage
• edev: Theme usage stats October 2001
• Proper English Usage for Real Estate Agents
• electricity usage of servers
• large numerals in traditional usage
• peak usage
• Modern English Usage
• Usage of the word like
• Usage determines meaning
• The movements exist on their own terms, manifesting rare beauty
• rare mode
• Ever made it with an aardvark? We're quite rare.
• A Rare Book
• Rare Ltd.
• The Medium Rare Hamburger That Won't Kill You
• Tonic water: A rare commodity here in these parts
• Rare Earth
• rare Commodore hardware
• So rare you can still hear it moo
• The Two Dollar Rare Book Store
• rare
• Being average is rare
• Rare Air
• Rare Candy
• A miracle of rare device
• Rare Birds
• rares (user)
• Too weird to live, too rare to die
• Reject Rare Draft
• Shelley Breedlove and her rare identical quadruplets
• rare as rocking horse shit

If you Log in you could create a "rare usage" node. If you don't already have an account, you can register here.