| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been for [noun] | 192 |
|
| 2 | been for [noun pl] | 84 |
|
| 3 | be for centuries | 15 |
|
| 4 | [be] for centuries | 15 |
|
| 5 | [been] for centuries | 8 |
|
| 6 | been for century | 8 |
|
| 7 | been [prep] centuries | 8 |
|
