| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [be] for [num] years | 6 |
|
| 2 | n't [be] for [num] years | 6 |
|
| 3 | not be for [num] years | 6 |
|
| 4 | not been for [num] years | 5 |
|
| 5 | not [been] for [num] years | 5 |
|
