| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years leading up [prep] the | 9 |
|
| 2 | years leading up to [art] | 9 |
|
| 3 | years leading up [prep] [art] | 9 |
|
| 4 | years leading up [prep] the | 9 |
|
