| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] than once a month | 9 |
|
| 2 | [adv] than once a month | 9 |
|
| 3 | [adv] than once a month | 9 |
|
| 4 | less than once a month | 6 |
|
| 5 | less than once a month | 6 |
|
