| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| who passed the 15th amendment | 0.65 | 0.9 | 995 | 75 |
| who passed the 15th amendment as law | 0.48 | 0.3 | 9283 | 74 |
| when was the 15th amendment passed | 0.57 | 0.9 | 4888 | 90 |
| what year was the 15th amendment passed | 0.59 | 0.5 | 4646 | 70 |
| when were the 13th 14th 15th amendment passed | 0.68 | 0.3 | 8716 | 62 |
| why was the 15th amendment passed | 0.26 | 0.2 | 5510 | 78 |
| 15th amendment passed by republicans | 0.57 | 0.7 | 1129 | 27 |
| 15th amendment passed | 1.34 | 0.8 | 3314 | 28 |
| why were the 13th 14th 15th amendment passed | 1.39 | 0.3 | 3678 | 97 |
| when was the 15th amendment passed into law | 0.52 | 0.5 | 8931 | 15 |
| when the 15th amendment passed | 0.67 | 0.7 | 2652 | 94 |
| what president passed the 15th amendment | 1.63 | 0.7 | 2718 | 11 |
| who did the 15th amendment apply to | 1.33 | 0.2 | 5064 | 70 |
| who was the 15th amendment | 0.24 | 0.7 | 4117 | 89 |
| what date was the 15th amendment passed | 0.69 | 1 | 2478 | 86 |
| who was president when 15th amendment passed | 0.16 | 0.9 | 8171 | 37 |
| when was the 15 amendment passed | 0.61 | 0.7 | 1320 | 41 |
| when did 15th amendment pass | 1.57 | 0.8 | 8917 | 76 |
