| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have [verb] down to | 11 |
|
| 2 | which have [vb pp] down to | 11 |
|
| 3 | which have come down to | 7 |
|
| 4 | which have come down to | 7 |
|
| 5 | which has [verb] down to | 6 |
|
