| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] than [n mass] a | 160 |
|
| 2 | [adv] [n mass] a week | 130 |
|
| 3 | than [n mass] a week | 48 |
|
| 4 | [adv] than a week | 24 |
|
