code: def get_frequencies(self, n):
      return np.linspace(
          0,
          (self.backcast_length + self.forecast_length)
          / self.min_period,
          n,
      )
  
imports: from typing import Tuple
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 3 for calling the NBEATSSeasonalBlock obj's underlying member method code with example usage: obj.get_frequencies(n) and returns: np