how to find out how many times a word appears in a collection of documents?

[liviuchristian]

Hi everyone,
I need to "read" the solr/lucene index and see how many times does words appear 
in all documents. For example: I have a collection of 1 mil documents and I 
want to see a list like this:the - 100000 timesbread - 1000 timesspoon - 10 
timesfork - 5 times
etc.
How do I do that???
Kind regards,Christian