Origin of "呆" "待" Mix

In today's 呆 reading dāi,待 reading dāi and dai.Dāi sound in stay the meaning of the word there is the case mix.待 than the word 呆 there early,there is the word 待 in the pre-Qin,and 呆 was the classical Chinese of the 保,to the Yuan Dynasty is a silly significance.Before the Ming and Qing Dynasties,待 had not the meaning of the word stay meaning,the meaning has begun since the Ming and Qing Dynasties.In the Ming and Qing Dynasties,呆 only had the meaning of stupid,but before and after the liberation in the contemporary literature it had the meaning of stay,also at this time,呆 待 could be mixed.待 was read dāi after the mix by the impact of 呆.