| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] of years [pers pn] | 36 |
|
| 2 | a couple of years [pers pn] | 20 |
|
| 3 | a number of years [pers pn] | 12 |
|
| 4 | a [noun sg] of years it | 8 |
|
| 5 | a [noun sg] of years i | 7 |
|
| 6 | a [noun sg] of years we | 6 |
|
| 7 | a [noun sg] of years they | 5 |
|
