| Keyword | CPC | PCC | Volume | Length string | Score |
|---|---|---|---|---|---|
| letter for the validators | 1.82 | 0.6 | 8127 | 25 | 32 |
| letter for the validators in research | 1.29 | 0.9 | 4843 | 37 | 62 |
| validation letter for research sample | 0.32 | 0.7 | 7677 | 37 | 71 |
| validation letter for research example | 1.19 | 0.7 | 3658 | 38 | 76 |
| how to make validation letter for research | 0.69 | 0.7 | 6753 | 42 | 28 |
| letter for validation of research instrument | 0.47 | 0.1 | 3432 | 44 | 79 |
