| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [conj] a [noun] | 213 |
|
| 2 | is often [vb pp] [conj] [noun] | 55 |
|
| 3 | often [vb pp] [conj] a [noun] | 17 |
|
| 4 | is often [vb pp] [conj] a | 15 |
|
| 5 | is often [vb pp] a [noun] | 6 |
|
