code: def time_infer_freq(self, freq):
      infer_freq(self.idx)
  
imports: from datetime import timedelta
  import dateutil
  import numpy
  from pandas import DataFrame, Series, date_range, period_range, timedelta_range
  from pandas.tseries.frequencies import infer_freq
  from .pandas_vb_common import setup
label_desc: Use image node_id 2 for calling the InferFreq obj's underlying member method code with example usage: obj.time_infer_freq(freq) without return types