| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] for about 30 | 13 |
|
| 2 | [vb base] for about 30 | 7 |
|
| 3 | [noun] for about 30 | 7 |
|
| 4 | [noun sg] for about 30 | 5 |
|
| 5 | for about 30 [noun] | 22 |
|
| 6 | for about 30 [noun pl] | 19 |
|
| 7 | for about 30 minute | 12 |
|
| 8 | for about 30 minutes | 12 |
|
| 9 | for about 30 [no cls] | 5 |
|
| 10 | for about 30 [unc] | 5 |
|
| 11 | for about 30 per | 5 |
|
| 12 | for about 30 per | 5 |
|
