| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| proceedings of national academy of sci | 0.45 | 0.8 | 7463 | 68 | 38 |
| proceedings | 0.68 | 0.6 | 5838 | 75 | 11 |
| of | 0.36 | 0.5 | 6189 | 71 | 2 |
| national | 0.94 | 1 | 2067 | 57 | 8 |
| academy | 0.95 | 0.7 | 589 | 21 | 7 |
| of | 0.92 | 0.6 | 200 | 97 | 2 |
| sci | 0.48 | 0.7 | 466 | 83 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| proceedings of national academy of science | 0.09 | 0.1 | 4510 | 14 |
| proceedings of national academy of sci | 1.85 | 0.2 | 6274 | 14 |
| proceedings of the national academy sciences | 1.55 | 0.1 | 4826 | 87 |
| proceedings national academy of sciences usa | 1.41 | 0.8 | 8320 | 22 |
| journal proceedings national academy sciences | 1.99 | 0.2 | 5385 | 94 |
