| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what [is] usually [verb] | 18 |
|
| 2 | [prep] what [is] usually [vb pp] | 18 |
|
| 3 | [prep] what is usually [verb] | 17 |
|
| 4 | of what [is] usually [verb] | 6 |
|
