| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [pron] a [num ord] | 9 |
|
| 2 | [prep] [v-ing] [pron] a second | 7 |
|
| 3 | [prep] [v-ing] [pers pn] a [num ord] | 7 |
|
