class_docstr: Accessor object for datetimelike properties of the Series values.
  
  Examples
  --------
  >>> s.dt.hour
  >>> s.dt.second
  >>> s.dt.quarter
  
  Returns a Series indexed like the original Series.
  Raises TypeError if the Series does not contain datetimelike values.
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code: def freq(self):
      return self._get_values().inferred_freq
  
imports: import numpy
  from pandas.core.dtypes.common import is_categorical_dtype, is_datetime64_dtype, is_datetime64tz_dtype, is_datetime_arraylike, is_integer_dtype, is_list_like, is_period_arraylike, is_timedelta64_dtype
  from pandas.core.dtypes.generic import ABCSeries
  from pandas.core.accessor import PandasDelegate, delegate_names
  from pandas.core.algorithms import take_1d
  from pandas.core.arrays import DatetimeArray, PeriodArray, TimedeltaArray
  from pandas.core.base import NoNewAttributesMixin, PandasObject
  from pandas.core.indexes.datetimes import DatetimeIndex
  from pandas.core.indexes.timedeltas import TimedeltaIndex
label_desc: Use image node_id 2 for calling the DatetimeProperties obj's underlying member method code with example usage: obj.freq() and returns: self