| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a [noun sg] of years | 92 |
|
| 2 | [adv] a [noun sg] of years | 64 |
|
| 3 | [adv] a couple of years | 52 |
|
| 4 | [adv] a number of years | 27 |
|
| 5 | [adv prt] a [noun sg] of years | 25 |
|
| 6 | over a [noun sg] of years | 17 |
|
| 7 | only a [noun sg] of years | 17 |
|
| 8 | only a [noun sg] of years | 17 |
|
| 9 | over a [noun sg] of years | 17 |
|
| 10 | quite a [noun sg] of years | 13 |
|
| 11 | quite a [noun sg] of years | 13 |
|
| 12 | just a [noun sg] of years | 8 |
|
| 13 | just a [noun sg] of years | 8 |
|
