I am writing a document with a list of accomplishments and want to indicate that I did something at least 4 times. It was definitely more than just 4 instances, but I can only recall 4 specific instances. I also do not want to waste precious space or be overly wordy by saying "at least 4" or "more than 4."
As such, I have want to use either "4+" or "+4".
Which one of these is correct or better to use? I believe that I have seen both used, but I'm not sure which is better.