| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] in [noun pl] | 98 |
|
| 2 | has been [vb pp] in terms | 24 |
|
| 3 | has been [vb pp] in patients | 10 |
|
| 4 | has been found in [noun pl] | 8 |
|
| 5 | has been described in [noun pl] | 6 |
|
| 6 | has been shown in [noun pl] | 6 |
|
| 7 | has been reported in [noun pl] | 6 |
|
| 8 | has been done in [noun pl] | 6 |
|
| 9 | has been made in [noun pl] | 5 |
|
