Get count of matches in documents

Elastic Stack Elasticsearch
1

I can search in documents for a term and get the count of that term in the
document with

{
"query": {
"query_string": {
"query": "myterm"
}
},
"script_fields": {
"term_count": {
"script": "_index['text']['myterm'].tf()"
}
}
}

Now suppose that the query is something like "term1 term2"~4 (term1 and
term2 with no more than 4 words between them), is that a way to obtain the
number of match of this combination inside the documents? I can count
occurrence of both terms with

{
"query": {
"query_string": {
"query": ""term1 term2"~1"
}
},
"script_fields": {
"term1_count": {
"script": "_index['text']['term1'].tf()"
},
"term2_count": {
"script": "_index['text']['term2"].tf()"
}
}
}

But this does not tells me if they are one near the other. I though of
asking for highlight and count number of higlights but I think this is not
so correct.

Any clue?

Thanks in advance for any help.

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