| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a [num] years | 42 |
|
| 2 | [noun sg] [prep] a [num] years | 42 |
|
| 3 | [noun sg] for a [num] years | 20 |
|
| 4 | [noun sg] for a [num] years | 20 |
|
| 5 | [noun sg] [prep] a hundred years | 20 |
|
| 6 | [noun sg] [prep] a thousand years | 12 |
|
| 7 | [noun sg] of a [num] years | 11 |
|
| 8 | [noun sg] of a [num] years | 11 |
|
| 9 | [noun sg] in a [num] years | 9 |
|
| 10 | [noun sg] in a [num] years | 9 |
|
| 11 | [noun sg] [prep] a million years | 6 |
|
