Display the most frequently occurring envelope From:, Subject:,
    or message content fields found in message files in the channel
    queues.

    Syntax

      PMDF QTOP  [channel]

    Command Qualifiers             Defaults

    /CONTENT[=offset-specifier]    None
    /DATABASE                      /DATABASE
    /DIRECTORY_TREE                /DATABASE
    /ENV_FROM[=offset-specifier]   None
    /MIN_COUNT=n                   /MIN_COUNT=2
    /SUBJECT[=offset-specifier]    /SUBJECT=(START=1,LENGTH=2147483647)
    /THREADS=n                     /NOTHREADS
    /TOP=n                         /TOP=20
    /VERBOSE                       /NOVERBOSE