arrest rate; clear-up rate; crime-arrest ratio
Used in crime statistics to indicate the proportion of reported crimes that result in an arrest or clearance.
The arrest rate this year is higher than last year.
The police are focusing on improving the clear-up rate.
犯罪率 is the crime rate (incidence of crime), whereas 検挙率 is the rate at which crimes are solved or arrests are made.
Compound of 検挙 (arrest, apprehension) and 率 (rate, ratio).