| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once or [adv] a month | 10 |
|
| 2 | once or [adv] [art] month | 10 |
|
| 3 | once or [adv] a month | 10 |
|
| 4 | once or [adv] [art] month | 10 |
|
| 5 | once or twice [art] month | 10 |
|
