| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for about [adj] | 1333 |
|
| 2 | [prep] about thirty | 89 |
|
| 3 | [prep] about thirty | 89 |
|
| 4 | for [adv] thirty | 79 |
|
| 5 | for about thirty | 24 |
|
