| Keyword | CPC | PCC | Volume | Length string | Score |
|---|---|---|---|---|---|
| lewis et al. 2012 | 0.28 | 0.8 | 1751 | 17 | 97 |
| lewis et al. 2015 | 0.34 | 0.3 | 7964 | 17 | 93 |
| lewis et al. 2013 | 0.1 | 0.6 | 4719 | 17 | 69 |
| lewis et al. 2014 | 1.03 | 1 | 1761 | 17 | 61 |
| lewis et al. 2011 | 0.23 | 0.7 | 1078 | 17 | 47 |
| lewis et al. 2016 | 1.41 | 0.8 | 6648 | 17 | 47 |
| lewis et al. 2019 | 1.28 | 0.9 | 3378 | 17 | 77 |
| lewis et al. 2021 | 1.34 | 0.5 | 9960 | 17 | 22 |
| lewis et al. 2020 | 1.83 | 0.9 | 5724 | 17 | 65 |
| lewis et al. 2017 | 1.66 | 0.5 | 4033 | 17 | 26 |
| lewis et al. 2018 | 0.22 | 0.3 | 6133 | 17 | 17 |
