If you believe that, then I have to say you're a bit naive mate. Accident will be defined as anything which causes damage to the vehicle, another vehicle, or any other object or person as an educated guess. That definitely included dings and scrapes, but not bumper chips (although I assume that was a facetious addition).
You should've informed them in Feb, so this may well now bit you in the arse as they'll chase you for increased premium. Sometimes, it's ALWAYS worth telling your insurers, and sucking it up. We all make mistakes sometimes, no shame in that.