| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] [adv] a | 313 |
|
| 2 | [prep] [adv] a week | 184 |
|
| 3 | be [adv] a week | 80 |
|
| 4 | be [prep] a week | 15 |
|
