final Object docFreqObj = existingSource.get(FieldNames.DOC_FREQ);
        if (docFreqObj == null) {
            updatedDocFreq = docFreq;
        } else {
            final Long existingValue = Long.parseLong(docFreqObj.toString());
            updatedDocFreq = docFreq + existingValue;
        }
        map.put(FieldNames.DOC_FREQ, updatedDocFreq);

        map.put(FieldNames.USER_BOOST, userBoost);

            secondLine.put("reading_" + i, readings[i]);
        }

        secondLine.put("fields", item.getFields());
        secondLine.put("queryFreq", item.getQueryFreq());
        secondLine.put("docFreq", item.getDocFreq());
        secondLine.put("userBoost", item.getUserBoost());
        secondLine.put("score", (item.getQueryFreq() + item.getDocFreq()) * item.getUserBoost());
        secondLine.put("tags", item.getTags());

        final long start = System.currentTimeMillis();

        final SuggestDeleteResponse deleteResponse =
                deleteByQuery(QueryBuilders.boolQuery().must(QueryBuilders.rangeQuery(FieldNames.DOC_FREQ).gte(1))
                        .mustNot(QueryBuilders.matchPhraseQuery(FieldNames.KINDS, SuggestItem.Kind.QUERY.toString()))

                    ScoreFunctionBuilders.weightFactorFunction(prefixMatchWeight)));
        }

        flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(ScoreFunctionBuilders.fieldValueFactorFunction(FieldNames.DOC_FREQ)
                .missing(0.1f).modifier(FieldValueFactorFunction.Modifier.LOG2P).setWeight(1.0F)));

    }

    public long getAllWordsNum() {
        return getNum(QueryBuilders.matchAllQuery());
    }

    public long getDocumentWordsNum() {
        return getNum(QueryBuilders.rangeQuery(FieldNames.DOC_FREQ).gte(1));
    }

    public long getQueryWordsNum() {
        return getNum(QueryBuilders.rangeQuery(FieldNames.QUERY_FREQ).gte(1));
    }

    private long getNum(final QueryBuilder queryBuilder) {