code: def rfftfreq(n, d=1.0, chunks="auto"):
      n = int(n)
      d = float(d)
  
      r = _arange(n // 2 + 1, dtype=float, chunks=chunks)
      r /= n * d
  
      return r
  
file_path: dask/dask/array/fft.py
imports: from __future__ import annotations
  import inspect
  from collections.abc import Sequence
  import numpy
  from dask.array.core import asarray
  from dask.array.core import concatenate
  from dask.array.creation import arange
  from dask.utils import derived_from, skip_doctest
label_desc: Use image node_id 9 for calling a global function with example usage: rfftfreq(n, d, chunks) and returns: r