request.setIndex("test-index");
        request.setSize(20);
        request.setSeed("test-seed");
        request.setWindowSize(30);
        request.setQueryFreqThreshold(5);

        assertNotNull(request);
    }

    @Test
    public void test_addTag() throws Exception {
        indexQueryItems();

     * @param queryFreqThreshold The query frequency threshold.
     * @return This builder instance.
     */
    public PopularWordsRequestBuilder setQueryFreqThreshold(final int queryFreqThreshold) {
        request.setQueryFreqThreshold(queryFreqThreshold);
        return this;
    }

        assertNotNull(response);
    }

    @Test
    public void test_setQueryFreqThreshold() throws Exception {
        indexItems();

        PopularWordsResponse response = suggester.popularWords().setQueryFreqThreshold(5).execute().getResponse();

        assertNotNull(response);
    }

    @Test
    public void test_chainedBuilder() throws Exception {
        indexItems();

                        .setSize(fessConfig.getSuggestPopularWordSizeAsInteger())
                        .setWindowSize(fessConfig.getSuggestPopularWordWindowSizeAsInteger())
                        .setQueryFreqThreshold(fessConfig.getSuggestPopularWordQueryFreqAsInteger());
                popularWordsRequestBuilder.setSeed(baseSeed);
                stream(baseTags).of(stream -> stream.forEach(tag -> popularWordsRequestBuilder.addTag(tag)));

        excludeWords.add(excludeWord);
    }

    /**
     * Sets the query frequency threshold.
     * @param queryFreqThreshold The query frequency threshold.
     */
    public void setQueryFreqThreshold(final int queryFreqThreshold) {
        this.queryFreqThreshold = queryFreqThreshold;
    }

    @Override
    protected void processRequest(final Client client, final Deferred<PopularWordsResponse> deferred) {