Normalize word usage over time

[hopperelec]

Currently, the "[word] Usage over time" graph is pretty much no different to "Messages sent over time by [month]". Instead of showing the number of usages, it should a relative quantity. Percentage of words might not be very good because this would reach sub-1% very quickly, but what could work is a percentage relative to the most used word (but don't show it as a percentage because this would be confusing). For example, if "lol" is the most used word and written 162 times in one month and "lmao" is the second most used word and written 41 times in that same month, "lol" should show as 100 and "lmao" should show as $41/162\approx25$. One problem I can see with this is that the top word would likely show as 100 for all months, but there might be a way to mix some of these methods to provide a more useful number.