| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years or so [conj] | 7 |
|
| 2 | [prep] [num] years [coord] so [conj] | 7 |
|
| 3 | for [num] years [coord] so [conj] | 5 |
|
| 4 | for [num] years [coord] so [conj] | 5 |
|
