| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long time | 1752 |
|
| 2 | [v-ing] [prep] a long | 141 |
|
| 3 | [v-ing] [prep] a time | 75 |
|
| 4 | [v-ing] a long time | 59 |
|
