as.data.frame.dfm: Convert a dfm to a data.frame
In koheiw/quanteda.core: Quantitative Analysis of Textual Data

Deprecated function to convert a dfm into a data.frame. Recommended that you use convert(x, to = "data.frame") instead.

## S3 method for class 'dfm'
as.data.frame(
  x,
  row.names = NULL,
  ...,
  document = docnames(x),
  docid_field = "doc_id",
  check.names = FALSE
)

`x`	any R object.
`row.names`	`NULL` or a character vector giving the row names for the data frame. Missing values are not allowed.
`...`	unused
`document`	optional first column of mode `character` in the data.frame, defaults `docnames(x)`. Set to `NULL` to exclude.
`docid_field`	character; the name of the column containing document names used when `to = "data.frame"`. Unused for other conversions.
`check.names`	logical. If `TRUE` then the names of the variables in the data frame are checked to ensure that they are syntactically valid variable names and are not duplicated. If necessary they are adjusted (by `make.names`) so that they are.