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

        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) {