pandas.infer_freq(index, warn=True)

Infer the most likely frequency given the input index. If the frequency is uncertain, a warning will be printed.


index : DatetimeIndex or TimedeltaIndex

if passed a Series will use the values of the series (NOT THE INDEX)

warn : boolean, default True


freq : string or None

None if no discernible frequency TypeError if the index is not datetime-like ValueError if there are less than three values.