| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| richardson's extrapolation formula | 1.56 | 0.7 | 4480 | 28 | 34 |
| richardson's | 1.39 | 1 | 6762 | 89 | 12 |
| extrapolation | 0.48 | 0.8 | 5468 | 39 | 13 |
| formula | 1.04 | 0.8 | 3288 | 63 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| richardson's extrapolation formula | 0.76 | 0.5 | 4372 | 86 |
