I am having trouble finding documentation to explain the doc_count and bg_count fields in the response to the significant terms aggregation.
For example I would expect that, if I do not set a background filter, the bg_count should the the total number of documents in the index. However what I see is that the bg_count is not the same for each result, and it isn't anywhere near the total number of documents.
I assume that doc_count is the number of documents containing the returned key.
What is the actual meaning of these values? Where can I find more complete documentation for that?
Very simply:
doc_count is the number of documents in the result set with the given termbg_count is the number of documents in the whole index with the given term