| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] million over [adj] years | 44 |
|
| 2 | [prep] [n mass] over [adj] years | 33 |
|
| 3 | [prep] [n mass] million over [adj] | 16 |
|
| 4 | [prep] [n mass] million [adj] years | 7 |
|
