| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [verb] been used for | 20 |
|
| 2 | [conj] have [been] used for | 20 |
|
| 3 | that [verb] [been] used for | 14 |
|
| 4 | [that] [verb] [been] used for | 14 |
|
| 5 | that [verb] [been] used for | 14 |
|
| 6 | [conj] [vb -s] [been] used for | 12 |
|
| 7 | [conj] has [been] used for | 8 |
|
| 8 | [conj] [vb past] [been] used for | 5 |
|
| 9 | [coord] [verb] [been] used for | 5 |
|
| 10 | [conj] had [been] used for | 5 |
|
