Are the shingles in the search-as-you-type field type *words* or *letters*?

Elastic Stack Elasticsearch
1

I assumed they were letters, but I can't get the field to behave the way I want (which is to have it support infix searches, like searching for "ethylpre" should match "methylprednisolone").

2

Shingles are based on words. What you are looking for is probably ngrams.

3

Thanks! =)