| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] usually express [prep] a | 5 |
|
| 2 | [noun sg] [is] usually express [prep] a | 5 |
|
| 3 | [is] usually express [prep] a percentage | 6 |
|
| 4 | [is] usually express [prep] a [noun] | 6 |
|
| 5 | [is] usually express [prep] a [noun sg] | 6 |
|
| 6 | [is] usually express [prep] a percentage | 6 |
|
