| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period [prep] time | 120 |
|
| 2 | [prep] a prolonged period [prep] time | 9 |
|
| 3 | [prep] a prolonged period [prep] time | 9 |
|
| 4 | over a prolonged period [prep] time | 7 |
|
| 5 | over [art] prolonged period [prep] time | 7 |
|
| 6 | over a prolonged period [prep] time | 7 |
|
| 7 | over a prolonged [noun] [prep] time | 7 |
|
| 8 | over a prolonged period [prep] time | 7 |
|
| 9 | over a prolonged period [prep] [noun] | 7 |
|
| 10 | over a prolonged period [prep] time | 7 |
|
| 11 | over [art] prolonged period [prep] time | 7 |
|
| 12 | over a prolonged [noun sg] [prep] time | 7 |
|
