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Word: certifies (lookup in dictionary) (lookup stats)
Dates: during 2000-2009
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Word Time Machine

Normalized population density for word "certifies" throughout decades:

1880s : 0.9452
1890s : 1.2709
1910s : 0.4200
1920s : 0.7793
1930s : 1.0629
1940s : 0.7952
1950s : 0.3784
1960s : 0.9636
1970s : 1.1203
1980s : 1.6564
1990s : 0.4941
2000s : 1.3344