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https://issues.apache.org/jira/browse/LUCENE-2393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom Burton-West updated LUCENE-2393:
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    Description: This is a pair of command line utilities that provide 
information on the total number of occurrences of a term in a Lucene index.  
The first  takes a field name, term, and index directory and outputs the 
document frequency for the term and the total number of occurrences of the term 
in the index (i.e. the sum of the tf of the term for each document).   The 
second reads the index to determine the top N most frequent terms (by document 
frequency) and then outputs a list of those terms along with  the document 
frequency and the total number of occurrences of the term. Both utilities are 
useful for estimating the size of the term's entry in the *prx files and 
consequent Disk I/O demands.   (was: This is a command line utility that takes 
a field name, term, and index directory and outputs the document frequency for 
the term and the total number of occurrences of the term in the index (i.e. the 
sum of the tf of the term for each document).  It is useful for estimating the 
size of the term's entry in the *prx files and consequent Disk I/O demands)

> Utility to output total term frequency and df from a lucene index
> -----------------------------------------------------------------
>
>                 Key: LUCENE-2393
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2393
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/*
>            Reporter: Tom Burton-West
>            Priority: Trivial
>         Attachments: LUCENE-2393.patch, LUCENE-2393.patch, LUCENE-2393.patch, 
> LUCENE-2393.patch
>
>
> This is a pair of command line utilities that provide information on the 
> total number of occurrences of a term in a Lucene index.  The first  takes a 
> field name, term, and index directory and outputs the document frequency for 
> the term and the total number of occurrences of the term in the index (i.e. 
> the sum of the tf of the term for each document).   The second reads the 
> index to determine the top N most frequent terms (by document frequency) and 
> then outputs a list of those terms along with  the document frequency and the 
> total number of occurrences of the term. Both utilities are useful for 
> estimating the size of the term's entry in the *prx files and consequent Disk 
> I/O demands. 

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