when loading the Document, you load the NgramsTable too:

http://localhost:8008/api/v1.0/document/11401/listGet?ngramsType=Terms&offset=0&limit=100&list=1

see last parameter

Used here:

https://gitlab.iscpif.fr/gargantext/purescript-gargantext/blob/dev/src/Gargantext/Pages/Corpus/Document.purs#L284

Taken from:

https://gitlab.iscpif.fr/gargantext/purescript-gargantext/blob/dev/src/Gargantext/Pages/Corpus.purs#L62