| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] over [num] years | 69 |
|
| 2 | million over [num] years | 56 |
|
| 3 | [n mass] million over [num] | 49 |
|
| 4 | [n mass] million [num] years | 7 |
|
