| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| what year was the underground railroad | 0.93 | 0.4 | 6457 | 4 | 38 |
| what | 1.65 | 0.7 | 4843 | 100 | 4 |
| year | 1.89 | 0.5 | 9233 | 73 | 4 |
| was | 1.13 | 0.8 | 1648 | 15 | 3 |
| the | 1.97 | 0.6 | 8670 | 86 | 3 |
| underground | 1.24 | 0.1 | 6786 | 72 | 11 |
| railroad | 1.99 | 0.9 | 2143 | 57 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what year was the underground railroad | 1.96 | 0.7 | 9873 | 88 |
| what year was the underground railroad made | 1.38 | 0.3 | 922 | 95 |
| what year was the underground railroad built | 0.94 | 1 | 8752 | 48 |
| what year was the underground railroad active | 1.75 | 0.2 | 2387 | 10 |
| what year did the underground railroad begin | 0.82 | 0.1 | 917 | 41 |
| what year did the underground railroad start | 0.45 | 1 | 6972 | 27 |
| underground railroad year | 1.97 | 0.1 | 1515 | 16 |
| what year did the underground railroad end | 0.37 | 0.5 | 7220 | 5 |
| harriet tubman underground railroad year | 1.77 | 0.7 | 9998 | 54 |
| when was the underground railroad year | 0.32 | 0.9 | 4351 | 79 |
| when did the underground railroad start year | 1.7 | 0.4 | 7168 | 31 |
