It's 10 Characters ,should take 1-2 days with one of the new GPU's.

The Character "2" makes it look longer than it actually is. If you had

http://2222222222hofxwd.onion/

http://cusidjkncmhofxwd.onion/

http://llllllllllhofxwd.onion/

http://lololololohofxwd.onion/

They all take the same amount of time to brute force. ( not counting the characters after the first 10).

Try it out for your self with Scallion https://github.com/lachesis/scallion

I just generated one starting with "seevees" in under 30 seconds (probably lucky):

<XmlMatchOutput>
  <GeneratedDate>2016-05-01T00:44:17.187487Z</GeneratedDate>
  <Hash>seevees2erh5333a.onion</Hash>
  <PrivateKey>-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
</PrivateKey>
     <PublicModulusBytes>98uXYW6ljdRxaS02lOM5kZ71cbrl0zaetlQ9n+jb6xbeztnDRtWGxzhxNz7Bv1Ps/L4SDutrskjwzZRzwpHwgLP7JKg5rxO6w/72exacJ8mKgZg4IRNyl23Hc0ZuNeVRzlmnUtjVsZT0Hj+GFg2b3BQvtHTIOvxZcr6JvZc    lkSc=</PublicModulusBytes>
  <PublicExponentBytes>JwCZfQ==</PublicExponentBytes>
</XmlMatchOutput>