There must be something especial and unique to this King:
than all the kings who preceded him in history - that in the category of Proper Nouns his Name - Title finds mention in Qur’ān 74 times which is second maximum number of mentioning, first being the name of his contemporary, the elevated Messenger Mūsā[Moses alai'his'slaam] that numbers 136 times.
http://haqeeqat.pk/Fir'aunPharaoh.htm
http://haqeeqat.pk/Fir'aunPharaoh.htm