| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] thank you letter | 6 |
|
| 2 | a thank you letter | 6 |
|
| 3 | [art] thank you letter | 6 |
|
| 4 | a thank you letter | 6 |
|
| 5 | thank you letter [prep] | 7 |
|
| 6 | thank you letter [prep] | 7 |
|
