| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| calhoun's theory of nullification | 0.33 | 0.9 | 1898 | 34 | 33 |
| calhoun's | 1.61 | 0.2 | 8970 | 11 | 9 |
| theory | 0.03 | 1 | 3147 | 32 | 6 |
| of | 1.27 | 1 | 7506 | 42 | 2 |
| nullification | 0.32 | 0.8 | 5975 | 1 | 13 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| calhoun's theory of nullification | 0.2 | 0.3 | 5037 | 44 |
