A.L.M.S. (Alef. Laam. Mim. Saad.)

Only one chapter is prefixed with these initials, chapter 7, and the letter "Alef" occurs in this chapter 2529 times, "Laam" occurs 1530 times, "Mim" occurs 1164 times, and "Saad" (Saad) occurs 97 times. Thus, the total occurrence of the four letters in this chapter (Sura) is :
2529+1530+1164+97 = 5320 = 19x280.
An important observation here is the interlocking relationship involving the letter "S" (Saad) . This initial occurs also in Sura's 19 and 38. While complementing its sister letters in Sura 7 to give a total that is divisible by 19, the frequency of this letter also complements its sister letters in chapters 19 and 38 to give a multiple of 19.
Additionally, the Quranic Initial "S" (Saad) interacts with the Quranic Initials "K.H.Y.`A." (Kaaf Haa Ya `Ayn) in Sura 19 to give another total that is also a multiple of 19. (See below). This interlocking relationship - which is not unique to the initial "S" (Saad) contributes to the intricacy of the Quran's numerical code.