| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] have been [vb pp] for [noun pl] | 36 |
|
| 2 | [noun pl] had been [vb pp] for [noun pl] | 11 |
|
| 3 | [noun pl] have been [vb pp] for centuries | 8 |
|
| 4 | [noun pl] have been used for [noun pl] | 7 |
|
| 5 | [noun pl] have been made for [noun pl] | 6 |
|
| 6 | [noun pl] have been [vb pp] for years | 5 |
|
