There are a lot of studies of demand on Police time during 24hr and week long periods that look at 999 crime categories, peak periods by crime, time spent on patrol by foot , policing of night time economies etc , time spent processing prisoners plus of course the staff that work at coroners courts, youth offending, mental health, child protection, adult safeguarding, prolific offender teams etc and of course policing public events. Most forces have the technology to track vehicles and officers by GPS .
Obviously, some officers don't get their priorities right or use their time as efficiently as they should. I remember one time that my car was in the garage and the Chief Super arranged for an officer to drive me home after a meeting at their Divisional HQ. We are about a mile from my house in a traffic jam and on the radio there's a call regarding a burglary and the officer said to me 'I'd better go to that after I have dropped you off at your house'. Felt obliged to say that I'd get out and walk as the burglary to me seemed more important.