| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] have been used [prep] a | 14 |
|
| 2 | [noun pl] have been used as a | 9 |
|
| 3 | [noun pl] have been used as a | 9 |
|
| 4 | [noun pl] have been used [prep] a | 6 |
|
| 5 | [noun pl] had been used [prep] a | 5 |
|
