Chris Hostetter wrote:
> I think either you missunderstood Nader's question or I did: I belive the
> goal is to determine what the most frequently occuring phrases are -- not
> determine how frequently a particular input phrase appears.
>   

Isn't the latter a pre-requisite for the former ? ;)

Regarding the subject: in many cases when I needed this information I 
used a brute-force method (traversing the term positions), and usually 
for moderately-sized indexes this was quick enough, i.e. in the order of 
minutes or hours. Of course, if you need something as quick as a search 
operation, this won't do.

-- 
Best regards,
Andrzej Bialecki     <><
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[__ || __|__/|__||\/|  Information Retrieval, Semantic Web
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