| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] a [noun sg] | 15531 |
|
| 2 | [prep] a time [noun sg] | 148 |
|
| 3 | [v-ing] [prep] a time | 75 |
|
| 4 | [v-ing] a time [noun sg] | 11 |
|
