| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] for 30 | 5 |
|
| 2 | be [v-ing] for 30 | 5 |
|
| 3 | [prep] [v-ing] for 30 | 5 |
|
| 4 | [be] [v-ing] for 30 | 5 |
|
| 5 | [v-ing] for 30 [noun pl] | 10 |
|
| 6 | [v-ing] for 30 [noun] | 10 |
|
| 7 | [v-ing] for 30 years | 7 |
|
| 8 | [v-ing] for 30 year | 7 |
|
