| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] about 30 | 114 |
|
| 2 | [prep] about 30 | 114 |
|
| 3 | of about 30 | 47 |
|
| 4 | for about 30 | 28 |
|
| 5 | to about 30 | 12 |
|
| 6 | from about 30 | 8 |
|
| 7 | at about 30 | 7 |
|
