Corpora: institutionalised expressions

[Marie Benveniste]

Dear List Members,
Does anybody know about an existing list of  "institutionalised
expressions" in French (in the sense defined by Michael Lewis Lexical
Approach 1993) or about current research on French Lexis that would take
into account Lewis' dichotomy (polywords, multiwords, collocations,
institutional phrases) ?
 Thanks in advance,

        Marie-Pierre Escoubas