// Test timestamp
        ZonedDateTime now = ZonedDateTime.now();
        item.setTimestamp(now);
        assertEquals(now, item.getTimestamp());

        // Test query frequency
        item.setQueryFreq(200L);
        assertEquals(200L, item.getQueryFreq());

        // Test document frequency
        item.setDocFreq(150L);
        assertEquals(150L, item.getDocFreq());

        // Test user boost

        if (logger.isInfoEnabled()) {
            logger.info("Deleting query words: index={}", index);
        }
        return deleteWordsByKind(FieldNames.QUERY_FREQ, SuggestItem.Kind.QUERY, item -> item.setQueryFreq(0), SuggestItem.Kind.DOCUMENT,
                SuggestItem.Kind.USER);
    }

    /**
     * Common method to delete words by kind.
     * @param freqField The frequency field name.

        this.timestamp = timestamp;
    }

    /**
     * Sets the query frequency of the suggest item.
     * @param queryFreq The query frequency to set.
     */
    public void setQueryFreq(final long queryFreq) {
        this.queryFreq = queryFreq;
    }

    /**
     * Sets the document frequency of the suggest item.
     * @param docFreq The document frequency to set.
     */