Getting total term frequency throughout entire index (Elasticsearch)

Question

I am trying to calculate the total number of times a particular term occurs throughout an entire index (term collection frequency). I have attempted to do so through the use of

Answer 1

I believe you need to turn term_statistics to true as per elasticsearch documentation:

Term statistics Setting term_statistics to true (default is false) will return

total term frequency (how often a term occurs in all documents)

document frequency (the number of documents containing the current term)

By default these values are not returned since term statistics can have a serious performance impact.