| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [v-ing] a first | 8 |
|
| 2 | [noun sg] [prep] [v-ing] a first | 5 |
|
| 3 | [prep] [v-ing] a first [noun sg] | 12 |
|
| 4 | [prep] [v-ing] a first [noun] | 12 |
|
