class_docstr: vocabulary 
docstr: candy _freq
docstr_tok: ["candy","_freq"]
code: def freq(self):
      """candy _freq"""
      return self._freq
  
file_path: delta/delta/data/utils/vocabulary.py
imports: import copy
  import collections
label_desc: Use image node_id 5 for calling the Vocabulary obj's underlying member method code with example usage: obj.freq() and returns: self