| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | patients who have had [adj] [noun] | 11 |
|
| 2 | patient who have had [adj] [noun sg] | 8 |
|
| 3 | patient who had had [adj] [noun] | 6 |
|
| 4 | patient who have had [adj] [noun] | 5 |
|
