| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] for [num] years | 67 |
|
| 2 | be for [num] years | 67 |
|
| 3 | [was/were] for [num] years | 24 |
|
| 4 | was for [num] years | 20 |
|
| 5 | been for [num] years | 17 |
|
| 6 | [been] for [num] years | 17 |
|
| 7 | is for [num] years | 16 |
|
| 8 | [is] for [num] years | 16 |
|
| 9 | [be] for two years | 14 |
|
| 10 | be for [num] years | 10 |
|
| 11 | [be] for [num] years | 10 |
|
| 12 | [be] for three years | 10 |
|
| 13 | [be] for five years | 6 |
|
