| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] seven years | 63 |
|
| 2 | [prep] seven years [unc] | 27 |
|
| 3 | [prep] [art] years [unc] | 14 |
|
| 4 | [art] seven years [unc] | 6 |
|
