| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been going [adv prt] for [num] years | 10 |
|
| 2 | been going [adv prt] [prep] [num] years | 10 |
|
| 3 | been going [adv prt] for [num] years | 10 |
|
| 4 | been going on [prep] [num] years | 9 |
|
