| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [adv] [prep] a | 989 |
|
| 2 | [be] [v-ing] [adv] [prep] time | 45 |
|
| 3 | [be] [v-ing] [prep] a time | 28 |
|
| 4 | [v-ing] [adv] [prep] a time | 13 |
|
| 5 | [be] [adv] [prep] a time | 8 |
|
