On ngrams table, check the list with 10 limit pagination change the limit, increase it and you will see that more ngrams were present but not shown in the first page even with the sort

https://dl.gargantext.org/2022-11-09-1413_pageSortFilteringIssue.ogv

When it is fixed, change the Occurrences as Int as Set of ContextId. Then for grouped terms, they will not be counted twice.