259 — Collection frequency code

14 codes · Introduced in Issue 60

Code Description History
a Annual
Yearly 		+60
b Biannual
Twice a year, or once per academic semester 		+60
d Daily, or more frequently than weekly modified
At least twice a week 		+60 · ✎66
e Biennial
Once every two years 		+60
f Fortnightly
Once every two weeks, or approximately twenty five times per year 		+60
i Irregular
No fixed publication schedule 		+60
m Monthly
Once every month, or approximately twelve times per year 		+60
q Quarterly
Four times a year 		+60
r Regular
New products in the collection are regularly scheduled, but less frequently than once every two years 		+68
s Bimonthly
Six times per year 		+60
t Triannual
Three times a year, or once per academic term 		+60
u Unknown +60
w Weekly
Or approximately fifty times per year 		+60
x No future publications
Positive indication that the product is the last to be published in the collection, or that no further publications are planned 		+60