| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [num] [noun] at [art] time | 20 |
|
| 2 | [v-ing] [num] [noun] [prep] a time | 19 |
|
| 3 | [v-ing] [num] [noun sg] [prep] [art] time | 16 |
|
| 4 | [v-ing] one [noun] [prep] [art] time | 15 |
|
