[NTG-context] Handling index entries with many references

Dear All, in my book I want to place the index (aka register) of places. Some of them are mentioned very often (>10). I want to keep that location in the index, but not to create references to all occurrences. In one old book I've found the following solution for this: in the index there are first three page references listed for that index entry followed by 'and many' phrase. Can something like this be done in the ConTeXt (MkIV)? No interactivity is needed. The PDF output will be used just for printing. \setupregister[index][coupling=yes] is not exactly what I want. Thanks, Jan