| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what happened in 1820 plague | 0.88 | 0.8 | 3192 | 12 |
| what happened in 1920 plague | 1.3 | 1 | 9760 | 38 |
| was there a plague in 1820 | 1 | 0.6 | 7016 | 71 |
| what happened in 1820 | 1.59 | 0.4 | 6477 | 86 |
| what epidemic happened in 1820 | 0.61 | 0.2 | 2933 | 10 |
| what happened in 1820 in american history | 1.34 | 0.6 | 9356 | 95 |
| what disease happened in 1820 | 0.77 | 0.4 | 7069 | 22 |
| what happened in 1820 in america | 0.66 | 0.4 | 4342 | 49 |
| what happened in 1620 plague | 0.37 | 1 | 6627 | 29 |
| what happened in the year 1820 | 1.23 | 0.5 | 7951 | 49 |
| what plague happened in 1520 | 1.99 | 0.3 | 978 | 53 |
| what plague happened in the early 1900s | 1.04 | 0.7 | 1837 | 10 |
| what plague happened in 1720 | 1.32 | 1 | 4754 | 20 |
| events that happened in 1820 | 0.28 | 0.8 | 5178 | 86 |
| disasters that happen in the 1820 | 0.01 | 0.4 | 5283 | 79 |
