| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [adv] [been] used for | 27 |
|
| 2 | [verb] [adv] been used for | 27 |
|
| 3 | has [adv] [been] used for | 14 |
|
| 4 | [vb -s] [adv] [been] used for | 14 |
|
| 5 | had [adv] [been] used for | 7 |
|
| 6 | [vb past] [adv] [been] used for | 7 |
|
| 7 | have [adv] [been] used for | 6 |
|
| 8 | [vb base] [adv] [been] used for | 6 |
|
| 9 | [verb] never [been] used for | 5 |
|
| 10 | [verb] only [been] used for | 5 |
|
