| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not been seen [prep] [det] | 10 |
|
| 2 | not been seen in [adj] | 10 |
|
| 3 | not been seen for [adj] | 9 |
|
| 4 | not been seen [prep] [num] | 8 |
|
| 5 | not been seen [prep] [adj] | 6 |
|
