Term Freqency sample using script fields.See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-advanced-scripting.html#_term_statistics

sample_sense.json

# Note: Please paste this sample to Sense, chrome plugin or Marvel.
# Note: I use 0.90.10 and 1.0.0.RC1

PUT /sample

PUT /sample/doc_count/a
{
  "text": "Java, Java, Java, Java is great."
}

PUT /sample/doc_count/b
{
  "text": "Java, Java is coffee."
}

GET /sample/doc_count/_search
{
  "query": {
    "query_string": {
      "default_field": "text",
      "query": "java"
    }
  },
  "script_fields": {
    "term_count": {
      "script": "_index['text']['java'].tf()"
    }
  }
}

TermFreqQuerySample

public class TermFreqQuerySample {

    public static void main(String... args){

        Settings settings = ImmutableSettings.settingsBuilder().put("cluster.name","test-es-cluster").build();
        Client client = new TransportClient(settings)
            .addTransportAddress(new InetSocketTransportAddress("192.168.30.114",9300));

        QueryBuilder query = QueryBuilders.queryString("java")
            .defaultField("text");

        SearchResponse sr = client
            .prepareSearch("sample")
            .setQuery(query)
            .addScriptField("term_count", "_index['text']['java'].tf()")
            .execute()
            .actionGet();

        long hits = sr.getHits().getTotalHits();

        System.out.println("hits:["+hits+"]");
        for(SearchHit hit : sr.getHits()){
            System.out.println("--------------------");
            System.out.println("term_count:"+hit.field("term_count").getValue());
        }

        client.close();
    }
}

Hi

When I run your exact command I get following error while search
{

took: 47
timed_out: false
_shards: {
    total: 5
    successful: 3
    failed: 2
    failures: [
        {
            index: sample
            shard: 2
            status: 500
            reason: PropertyAccessException[[Error: unresolvable property or identifier: _index] [Near : {... _index['text']['java'].tf() ....}] ^ [Line: 1, Column: 1]]
        }
        {
            index: sample
            shard: 3
            status: 500
            reason: PropertyAccessException[[Error: unresolvable property or identifier: _index] [Near : {... _index['text']['java'].tf() ....}] ^ [Line: 1, Column: 1]]
        }
    ]
}
hits: {
    total: 2
    max_score: 0.26849622
    hits: [ ]
}

}