| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a time [prep] | 808 |
|
| 2 | [v-ing] [prep] time [prep] | 79 |
|
| 3 | [v-ing] [prep] a time | 75 |
|
| 4 | [v-ing] [prep] a [prep] | 16 |
|
| 5 | [v-ing] a time [prep] | 7 |
|
