| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [vb pp] [prep] a | 10681 |
|
| 2 | [is] usually [vb pp] [prep] | 784 |
|
| 3 | usually [vb pp] [prep] a | 339 |
|
| 4 | [is] usually [prep] a | 21 |
|
| 5 | [is] usually [vb pp] a | 9 |
|
