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Word: insulator (lookup in dictionary) (lookup stats)
Dates: during 174397-174397
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Word Time Machine

Normalized population density for word "insulator" throughout decades:

1880s : 0.9716
1930s : 2.4277
1940s : 1.1677
1950s : 1.3613
1960s : 1.4407
1970s : 1.6450
1980s : 0.6810
1990s : 0.2902
2000s : 0.3325