| u |
Unknown |
|
60 |
|
| i |
Irregular |
No fixed publication schedule |
60 |
|
| e |
Biennial |
Once every two years |
60 |
|
| a |
Annual |
Yearly |
60 |
|
| b |
Biannual |
Twice a year, or once per academic semester |
60 |
|
| t |
Triannual |
Three times a year, or once per academic term |
60 |
|
| q |
Quarterly |
Four times a year |
60 |
|
| s |
Bimonthly |
Six times per year |
60 |
|
| m |
Monthly |
Once every month, or approximately twelve times per year |
60 |
|
| f |
Fortnightly |
Once every two weeks, or approximately twenty five times per year |
60 |
|
| w |
Weekly |
Or approximately fifty times per year |
60 |
|
| d |
More frequently than weekly |
|
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 |
|
