| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [num] year period | 71 |
|
| 2 | over a five year period | 13 |
|
| 3 | over a five year period | 13 |
|
| 4 | over a two year period | 11 |
|
| 5 | over a two year period | 11 |
|
| 6 | over a three year period | 11 |
|
| 7 | over a three year period | 11 |
|
| 8 | over a ten year period | 5 |
|
| 9 | over a ten year period | 5 |
|
