| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [v-ing] [prep] a | 4995 |
|
| 2 | [noun] [prep] a time | 1840 |
|
| 3 | [v-ing] [prep] a time | 75 |
|
| 4 | [noun] [v-ing] [prep] time | 47 |
|
