| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] seven years | 9 |
|
| 2 | [v-ing] [prep] seven years | 9 |
|
| 3 | [v-ing] for seven years | 5 |
|
| 4 | [v-ing] for seven years | 5 |
|
| 5 | [v-ing] seven years [prep] | 7 |
|
| 6 | [v-ing] seven years [prep] | 7 |
|
