| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for three years | 608 |
|
| 2 | to three years | 200 |
|
| 3 | in three years | 163 |
|
| 4 | of three years | 159 |
|
| 5 | after three years | 146 |
|
| 6 | within three years | 99 |
|
| 7 | from three years | 14 |
|
| 8 | with three years | 13 |
|
| 9 | by three years | 11 |
|
| 10 | until three years | 11 |
|
| 11 | at three years | 9 |
|
| 12 | over three years | 6 |
|
| 13 | past three years | 5 |
|
| 14 | like three years | 5 |
|
