| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] of | 86480 |
|
| 2 | [prep] a prolonged [noun] | 122 |
|
| 3 | a prolonged [noun] of | 60 |
|
| 4 | [prep] prolonged [noun] of | 21 |
|
