<P> The four - leaf clover is a rare variation of the common three - leaf clover . According to traditional superstition, such clovers bring good luck, though it is not clear when or how that superstition got started . The earliest mention of "Fower - leafed or purple grasse" is from 1640 and simply says that it was kept in gardens because it was "good for the purples in children or others". A description from 1869 says that four - leaf clovers were "gathered at night - time during the full moon by sorceresses, who mixed it with vervain and other ingredients, while young girls in search of a token of perfect happiness made quest of the plant by day". The first reference to luck might be from an 11 - year - old girl, who wrote in an 1877 letter to St. Nicholas Magazine, "Did the fairies ever whisper in your ear, that a four - leaf clover brought good luck to the finder?" </P> <P> It is claimed that there are approximately 10,000 three - leaf clovers for every four - leaf clover . However, an actual survey of over 5 million clovers found the real frequency to be closer to 5,000 to 1, double the said probability . </P> <P> Even so, this probability has not deterred collectors who have reached records as high as 170,000 four - leaf clovers in a lifetime . However, the world record for four - leaf clovers in a single day is at least 166, with the record for one hour being 166, set by an American named Katie Borka on June 23, 2018 . </P>

What is the percentage of finding a four leaf clover