When accessing a Metamorph index as a table, via indexaccess,
two new columns were added in version 6. The first is
RowCount, the count of table rows (documents) the word occurs
in. (This is the same as the Count value, but more
specifically-named. The Count column is deprecated and may be
removed in a future release.) The other new column is
OccurrenceCount, which is the count of all hits of the word,
i.e. sum of all occurrences in all documents. OccurrenceCount
is available for Metamorph inverted indexes only; for non-inverted
metamorph indexes it is not present.