| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used for | 195 |
|
| 2 | [verb] been used for | 195 |
|
| 3 | to have been [verb] for | 91 |
|
| 4 | to have been [vb pp] for | 78 |
|
| 5 | to have been used [prep] | 34 |
|
| 6 | to have be used for | 10 |
|
| 7 | [to-vb] been used for | 10 |
|
| 8 | to have [be] used for | 10 |
|
| 9 | to have been use for | 10 |
|
| 10 | to have [been] used for | 10 |
|
