| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been a [adj] [noun] | 4462 |
|
| 2 | undergoing a [adj] [noun] | 44 |
|
| 3 | been undergoing [adj] [noun] | 9 |
|
| 4 | been undergoing a [adj] | 7 |
|
