| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] the past three years [pers pn] | 14 |
|
| 2 | [prep] the past three years [pers pn] | 14 |
|
| 3 | for the past three years [pers pn] | 5 |
|
| 4 | for the past three years [pers pn] | 5 |
|
| 5 | [prep] the past three years we | 5 |
|
