| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] ten [noun sg] period | 7 |
|
| 2 | over [art] ten year period | 7 |
|
| 3 | over a ten [noun sg] period | 5 |
|
| 4 | over a ten [noun sg] period | 5 |
|
