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Word: substructure (lookup in dictionary) (lookup stats)
Dates: during 175109-175109
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Word Time Machine

Normalized population density for word "substructure" throughout decades:

1890s : 1.5746
1920s : 1.1587
1930s : 0.4389
1940s : 0.4222
1950s : 1.4064
1960s : 1.6280
1970s : 2.3793
1980s : 1.2313
1990s : 0.2623
2000s : 0.4509