... and stammering

It turns out that "stammer" also comes up 12 times in the kindle edition of LotR, but the distribution is a bit more egalitarian:

• Bilbo 1x
• On being reminded by Gandalf that he'd agreed to give up the Ring (p. 33)
• Frodo 4x
• After hearing the Ring-verse (p. 51)
• As he's struggling against Old Man Willow's spell but getting overpowered by it (p. 117)
• After he spontaneously breaks into song praising Goldberry (p. 124) 
• On realizing how old Elrond is (p. 243)
• Sam 1x
• After reciting the Gil-galad poem (p. 186)
• Gimli 1x 
• On being invited to request a gift from Galadriel (p. 376)
• Pippin 3x
• Initial response to Gandalf about what he saw in the palantir (he's trying to deceive Gandalf with a partial truth) (p. 593)
• Responding to Beregond's question about Aragorn's identity (he realizes he slipped up by mentioning him) (p. 761)
• Attempting to comfort a crying Denethor (p. 823)
• Merry 2x
• On learning he will ride with Theoden (he was worried about his uselessness) (p. 777)
• On learning he will be left behind and is being released from service (uselessness confirmed!) (p. 801)