| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] be used for | 9 |
|
| 2 | [adv] have be used for | 7 |
|
| 3 | [adv] [verb] been used for | 7 |
|
| 4 | [adv] [vb infin] be used for | 6 |
|
| 5 | [adv] have be used for | 6 |
|
