| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] over a [adj] period | 10 |
|
| 2 | [n mass] over a [adj] period | 10 |
|
| 3 | [n mass] over a period [prep] | 9 |
|
| 4 | [n mass] over a period of | 9 |
|
| 5 | [n mass] over a period [prep] | 9 |
|
| 6 | [n mass] over a period of | 9 |
|
