| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] express [prep] a | 32 |
|
| 2 | [noun] [is] usually express [prep] | 11 |
|
| 3 | [is] usually express [prep] a | 7 |
|
| 4 | [noun] [is] usually [prep] a | 6 |
|
