According to Zipf’s law, ” The probability of occurrence of words or other items starts high and tapers off.” Thus, a few occur very often while many others occur rarely. Ir was George Kingsley Zipf who discovered this law.
He discovered that the most popular word in the English language (“the”) is used ten times more than the tenth most popular word, 100 times more than the 100th most popular word and 1,000 times more than the 1,000th most popular word.
It has been discovered this effect applies to market share for most of the big and small corporations. It has been clear that being #1 is a lot better than being #5 or #10.