I am following English premier League and Australia A league. 80-85% matches 1st half Happen corner over 3.5 that's odds 1.32-1.40 . So anyone wants to safe betting then you can bet there. Not all matches. Select for a team like Manchester United. If Manchester United and it's partner fail to cover 3.5 corner in 1st half in a match then the next match stake high between Manchester United Vs opponent team. That's the simple tricks. This tips dose not work for 100%, so bet your own risk.
If this event really has a stable probability in the range of 80-85%, and the bookmakers offer odds of 1.32-1.4, then the bet on this outcome is profitable. Can you tell in more detail how you got this data and based on statistics for what period? In 10 matches, in 100 or more? Because if this is a small dataset, then fluctuations can be very large and the real probabilities of the occurrence of this event will be very different from those obtained by you.