I'd like to know how can I rank lower items, which have fields that are frequently appearing among the results.
Say, we have a similar result set:
"name": "Red T-Shirt" "store": "Zara" "name": "Yellow T-Shirt" "store": "Zara" "name": "Red T-Shirt" "store": "Bershka" "name": "Green T-Shirt" "store": "Benetton"
I'd like to rank the documents in such a manner that the documents containing frequently found fields,
"store" in this case, are deboosted to appear lower in the results.
This is to achieve a bit of variety, so that the search doesn't yield top results from the same store.
In the example above, if I search for "T-Shirt", I want to see one Zara T-Shirt at the top and the rest
of Zara T-Shirts should be appearing lower, after all other unique stores.
So far I tried to research for using aggregation buckets for sorting or script sorting, but without success.
Is it possible to achieve this inside of the search engine?
Many thanks in advance!