| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [prep] this | 548 |
|
| 2 | [prep] [v-ing] [indef pn] [prep] | 524 |
|
| 3 | [prep] [indef pn] [prep] this | 129 |
|
| 4 | [v-ing] [indef pn] [prep] this | 53 |
|
