How to filter results based on frequency of repeating terms in an array in elasticsearch -


i have array field lot of keywords , need sort documents on basis on how many times particular keyword repetation in arrays. eg,if field name "nationality" , document 1, consists of following doc1 nationality : 

["us","uk","australia","india","us","us"]

and doc2 nationality: 

["us","uk","us","us","us","china"]

i want documents shown term "us" occurs more 3 times. make doc2 shown. how this?

you can use scripting implemented. 

{       "query": {         "filtered": {           "filter": {             "script": {               "script": "_index['nationality']['us'].tf() > 3"             }           }         }       }     }

here in scripy array "nationality" checked term "us" , count taken tf (term frequency). documents term frequency greater 3 shown in results. can learn more filter operations here


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