Happy Grasshopper: How many homeowners have a 'go-to' agent?

So long as nothing goes drastically wrong, patients are likely to book appointments with one dentist for their two cleanings per year. Homeowners who aren’t handy themselves will probably call on the same maintenance help to fix the garbage disposal and, a month later, a leaky kitchen faucet. But how many real estate consumers have an agent on-hand between years of needing one?