The items in Zacks databases can have the following frequency codes:
Calendar Frequencies
Fiscal Frequencies
D - Daily (business days only)
F - Fiscal Quarterly
W - Weekly (Friday end)
Y - Fiscal Annual
M - Monthly
Q - Calendar Quarterly
A - Calendar Annual
Other Frequencies
E - Event frequency (A special frequency, in which a non-periodic date is assigned to the item. Split adjustment factors for stock splits and dividends, which occur on specific and non-periodic dates, is an example of E- frequency item).
X - No Frequency (No date is assigned to the item, for example: Ticker or Company Name).