Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† phrăsis, is, f., = φράσις, in rhetoric, diction (pure Lat. elocutio; post-Aug.): (in Albucio) non lexis magna, sed phrasis, Sen. Contr. 3 prooem.; acc. phrasin, Quint. 10, 1, 87 (id. 8, 1, 1, written as Greek).