| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] eight years | 300 |
|
| 2 | [v-ing] [prep] years | 123 |
|
| 3 | [v-ing] [prep] eight | 67 |
|
| 4 | [v-ing] eight years | 7 |
|
