How many times did you buy four horses?

100 times. Buying a horse is a way of playing in the lottery. Lottery tickets, also known as lotto, are used to raise prizes by drawing lots. According to the lottery information, buying horses in No.4 Middle School is 100 times. The English name of the lottery is "lotteryticket", and the lottery ticket is a certificate for the buyer to buy voluntarily according to certain rules and determine whether to get a reward.