American Heritage Dictionary
(26)
Century Dictionary
(20)
GNU Webster's 1913
(4)
WordNet
(17)
Elsewhere on the web
I don't know whether the dog-puff was the same or new.— Yannone
Setting fire to a bundle of dried leaves at around a pound a puff is a luxury to live without in straitened times.— The Independent - Frontpage RSS Feed
Uncle Bill, looking serenely at the circle of tense faces, continued to smoke while he took his own time to reply I'm a thinkin',"--puff-puff--"that when you sink a hundred feet below the surface,"--puff-puff--"you won't git a damn thing Involuntarily Yankee Sam reached for the poker and various eyes sought the wood-box for a sizable stick of wood Upon what do you base your opinion?"— The Man from the Bitter Roots
[_Picking up the handkerchief and puff, and rubbing the puff, which is an extremely ragged one, over her nose-- singing sentimentally._] "There are no friends like the old friends, The constant, tried, and true Sitting beside LILY._] Room for a little 'un LILY, without interrupting her talk with FARNCOMBE, lays her hand on JIMMIE'S for a moment.— The 'Mind the Paint' Girl A Comedy in Four Acts

American Heritage Dictionary (1)
Century Dictionary (3)
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You can expect to see this word about once a week.