| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] over [art] period of | 68 |
|
| 2 | [adv] over [art] period of | 40 |
|
| 3 | gradually over [art] period [prep] | 7 |
|
| 4 | gradually [prep] [art] period of | 7 |
|
| 5 | gradually over [art] [noun] of | 7 |
|
| 6 | gradually over [art] period of | 7 |
|
| 7 | gradually over [art] period of | 7 |
|
| 8 | gradually over [art] period of | 7 |
|
| 9 | gradually over [art] period [prep] | 7 |
|
| 10 | gradually over [art] [noun sg] of | 7 |
|
