| Name | Description | Type | Package | Framework |
| HighFreqTerms | HighFreqTerms class extracts the top n most frequent terms (by document frequency) from an existing Lucene index and reports their | Class | org.apache.lucene.misc | Apache Lucene |
| HighFreqTerms .DocFreqComparator | Class | org.apache.lucene.misc.HighFreqTerms | Apache Lucene | |
| HighFreqTerms .TotalTermFreqComparator | Class | org.apache.lucene.misc.HighFreqTerms | Apache Lucene | |