| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] [prep] [num] years | 836 |
|
| 2 | a [noun] of [num] years | 563 |
|
| 3 | a period [prep] [num] years | 226 |
|
| 4 | a period [prep] [num] years | 226 |
|
| 5 | a [noun] for [num] years | 189 |
|
| 6 | a [noun] [prep] five years | 104 |
|
| 7 | a [noun] [prep] three years | 87 |
|
| 8 | a [noun] [prep] two years | 81 |
|
| 9 | a [noun] [prep] ten years | 56 |
|
| 10 | a maximum [prep] [num] years | 48 |
|
| 11 | a maximum [prep] [num] years | 48 |
|
| 12 | a minimum [prep] [num] years | 41 |
|
| 13 | a minimum [prep] [num] years | 41 |
|
| 14 | a term [prep] [num] years | 38 |
|
| 15 | a term [prep] [num] years | 38 |
|
| 16 | a [noun] [prep] four years | 32 |
|
| 17 | a total [prep] [num] years | 32 |
|
| 18 | a total [prep] [num] years | 32 |
|
| 19 | a year [prep] [num] years | 30 |
|
| 20 | a year [prep] [num] years | 30 |
|
| 21 | a [noun] [prep] seven years | 28 |
|
| 22 | a [noun] [prep] twenty years | 27 |
|
| 23 | a [noun] [prep] 10 years | 27 |
|
| 24 | a [noun] [prep] six years | 23 |
|
| 25 | a [noun] in [num] years | 22 |
|
| 26 | a [noun] [prep] 20 years | 21 |
|
| 27 | a [noun] within [num] years | 18 |
|
| 28 | a [noun] [prep] 25 years | 15 |
|
| 29 | a [noun] [prep] 15 years | 14 |
|
| 30 | a [noun] [prep] thirty years | 13 |
|
