| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how long did spanish flu epidemic last | 0.17 | 0.1 | 1940 | 15 |
| how long did spanish flu pandemic last | 0.04 | 0.9 | 9640 | 74 |
| how long did spanish flu last | 0.1 | 0.9 | 104 | 56 |
| how long did it take for spanish flu to end | 1.39 | 0.4 | 5013 | 81 |
| how long was spanish flu | 0.95 | 1 | 3613 | 34 |
| how did the spanish influenza end | 1.58 | 0.7 | 8495 | 46 |
| when did spanish flu start and end | 1.21 | 1 | 8340 | 48 |
| when did the spanish flu pandemic end | 1.79 | 0.8 | 4469 | 5 |
| what ended the spanish flu | 1.41 | 0.7 | 2297 | 27 |
| spanish flu end date | 0.66 | 0.7 | 4061 | 52 |
| the end of the spanish flu | 0.28 | 0.5 | 1948 | 65 |
| years of spanish flu | 1.69 | 0.2 | 3908 | 9 |
| how long did the spanish influenza last | 1.71 | 0.1 | 1325 | 76 |
| spanish flu lasted how long | 0.58 | 1 | 390 | 74 |
| how long does the spanish flu last | 1.85 | 0.9 | 1570 | 2 |
| was the spanish flu an epidemic | 1.36 | 1 | 1510 | 48 |
| year of spanish flu epidemic | 1.91 | 0.1 | 6840 | 36 |
| spanish flu when did it end | 0.99 | 0.1 | 563 | 91 |
| when did the spanish flu ended | 0.8 | 0.8 | 8809 | 91 |
| spanish flu time period | 0.76 | 0.7 | 6020 | 93 |
