| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| letter of correction of error | 1.36 | 0.1 | 1158 | 3 | 29 |
| letter | 1.39 | 0.9 | 8798 | 82 | 6 |
| of | 1.18 | 0.1 | 6732 | 50 | 2 |
| correction | 1.03 | 0.5 | 237 | 8 | 10 |
| of | 1.21 | 0.8 | 6551 | 42 | 2 |
| error | 0.61 | 0.6 | 6382 | 96 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| letter of correction of error | 1.11 | 0.2 | 4733 | 20 |
