| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [adv] for 30 [noun] | 12 |
|
| 2 | [vb base] [adv] for 30 [noun pl] | 11 |
|
| 3 | [vb base] [adv] for 30 minutes | 7 |
|
| 4 | [vb base] [adv] for 30 minute | 7 |
|
