| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] for two [noun pl] | 12 |
|
| 2 | had been [verb] for two [noun] | 12 |
|
| 3 | had been [verb] for two year | 7 |
|
| 4 | had been [v-ing] for two [noun] | 7 |
|
| 5 | had been [verb] for two years | 7 |
|
| 6 | had been [vb pp] for two [noun] | 5 |
|
