Comparing monthly to dayly frequencies: DateOffset or Timedelta?
#### Code Sample, a copy-pastable example if possible

```python
import pandas as pd

offset_1M = pd.tseries.frequencies.to_offset('1MS')
offset_1D = pd.tseries.frequencies.to_offset('1D')

>>> offset_1M > offset_1D
Traceback (most recent call last):
  File "/.local/lib/python3.7/site-packages/pandas/tseries/offsets.py", line 2534, in f
    return op(self.delta, other.delta)
AttributeError: 'MonthBegin' object has no attribute 'delta'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/.local/lib/python3.7/site-packages/pandas/tseries/offsets.py", line 2538, in f
    f"Invalid comparison between {type(self).__name__} "
TypeError: Invalid comparison between Day and MonthBegin
```
#### Problem description

Hi, I would like to compare 2 frequencies, among which monthly frequency.
Two tools appear relevant for that but have each an issue:
- Timedelta that supports comparison, but not Month frequency
- DateOffset that supports Month frequency, but not comparison

Please, how should be this managed?

Thanks for your help.
Have a good day!
Bests
