I am trying to use date_range. I came across some values valid for freq, like BME and BMS and I would like to be able to quickly look up the proper strings to get what I want.
What values are valid in Pandas 'Freq' tags?
You can find it called Offset Aliases:
A number of string aliases are given to useful common time series frequencies. We will refer to these aliases as offset aliases.
Alias Description
B business day frequency
C custom business day frequency
D calendar day frequency
W weekly frequency
ME month end frequency
SME semi-month end frequency (15th and end of month)
BME business month end frequency
CBME custom business month end frequency
MS month start frequency
SMS semi-month start frequency (1st and 15th)
BMS business month start frequency
CBMS custom business month start frequency
QE quarter end frequency
BQE business quarter end frequency
QS quarter start frequency
BQS business quarter start frequency
YE year end frequency
BYE business year end frequency
YS year start frequency
BYS business year start frequency
h hourly frequency
bh business hour frequency
cbh custom business hour frequency
min minutely frequency
s secondly frequency
ms milliseconds
us microseconds
ns nanoseconds