ac·​ci·​den·​tol·​o·​gy | \ˌak-sə-dən-ˈtä-lə-jē, -(ˌ)den-\

Definition of accidentology 

: the study and analysis of the causes and effects of accidents Fatigue, vigilance and monotony were first studied in professional rail and road drivers, then, as motorway accidentology developed, in all car drivers.— Pierre-Emmanuel Barjonet, Traffic Psychology Today, 2001

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First Known Use of accidentology

1982, in the meaning defined above

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The first known use of accidentology was in 1982

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