There are so many combinations for a car key. So I believe there is a repetition rate, might be every 100 or 1000 or 10000. But still possible to grab a key from any Honda and be able to open the doors of another similar year range Honda.
My dad has poor vision and couple of times he had opened up another car (same make and color, parked in the same neighborhood) and only when inside he realizes that it is not his car.