restore DateOffset

Author: MarcoGorelli

pandas-stubs/core/frame.pyi

@@ -1684,7 +1684,7 @@ class DataFrame(NDFrame, OpsMixin, _GetItemHack):
     ) -> Self: ...
     def to_timestamp(
         self,
-        freq: Frequency | None = None,
+        freq: str | DateOffset | None = None,
         how: ToTimestampHow = ...,
         axis: Axis = 0,
         copy: _bool = True,

pandas-stubs/core/indexes/accessors.pyi

@@ -34,6 +34,7 @@ from typing_extensions import Never
 
 from pandas._libs.interval import Interval
 from pandas._libs.tslibs import BaseOffset
+from pandas._libs.tslibs.offsets import DateOffset
 from pandas._libs.tslibs.period import Period
 from pandas._libs.tslibs.timedeltas import Timedelta
 from pandas._libs.tslibs.timestamps import Timestamp
@@ -355,12 +356,12 @@ class _PeriodProperties(
     def strftime(self, date_format: str) -> _PeriodStrReturnTypes: ...
     def to_timestamp(
         self,
-        freq: Frequency | None = ...,
+        freq: str | DateOffset | None = ...,
         how: TimestampConvention = ...,
     ) -> _PeriodDTAReturnTypes: ...
     def asfreq(
         self,
-        freq: Frequency | None = ...,
+        freq: str | DateOffset | None = ...,
         how: Literal["E", "END", "FINISH", "S", "START", "BEGIN"] = ...,
     ) -> _PeriodPAReturnTypes: ...