| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | seen [prep] a [noun sg] | 1320 |
|
| 2 | been [prep] a [noun sg] | 728 |
|
| 3 | been seen [prep] a | 119 |
|
| 4 | been seen [prep] [noun sg] | 31 |
|
