The Collaborative International Dictionary of English v.0.48:

Phraseology \Phra`se*ol"o*gy\, n. [Gr. ?, ?, phrase + -logy: cf.
   F. phras['e]ologie.]
   1. Manner of expression; peculiarity of diction; style.
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            Most completely national in his . . . phraseology.
                                                  --I. Taylor.
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   2. A collection of phrases; a phrase book. [R.]
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   Syn: Diction; style. See Diction.
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WordNet (r) 3.0 (2006):

phraseology
    n 1: the manner in which something is expressed in words; "use
         concise military verbiage"- G.S.Patton [syn: wording,
         diction, phrasing, phraseology, choice of words,
         verbiage]